**Standard septic tank size for 4, 5, 6, 10, 15, 20, 25 and 50 users** | what is septic tank | septic tank size for 4 users | septic tank size for 5 users | septic tank size for 6 users | septic tank size for 10 users | septic tank size for 15 users | septic tank size for 20 users | septic tank size for 25 users | septic tank size for 30 users | septic tank size for 50 users | septic tank size for 100 users | septic tank size for residential building | septic tank size for commercial building.

Septic tank is scientifically well designed underground rcc concrete structure used for primary treatment of liquid wastage faecal material and urine into settleable solid or semi solid sludge.

It is well designed rectangular or circular water tight structure provided with one, two or three chamber used to treat liquid wastes into high settleable solids. Scientifically design septic tank involves two or three chamber with an inlet to collect liquid wastages from pour flush cistern and outlet to expel the effluent to soakage pit or sewer. As the Black Water flows through the septic tank, solid material settle at bottom of first chamber and Scum floats to the top.

Safety tank size:- In rural and urban areas of India, the typical safety tank size is 1500 × 750 × 1000 mm (5 × 2.5 × 4 feet) in respect to their length, width and depth. This is a standard size of safety tank for household use and faecal sludge management.

**What is septic tank?**

The term “**septic**” generally refers to the anaerobic bacterial environment that developed in Tank and that decomposes or mineralize the domestic wastewater into the tank.

**What is septic tank?**, Septic tank is scientifically well design underground chamber generally made of rcc or plain concrete, fiberglass, plastic or Steel through which domestic wastewater, fecal material, toilet and excretory product flows into it for primary treatment of waste material that decompose and change into settleable solid or semi-solid sludge.

In United States, there are various type of ready made septic tank available in market are concrete septic tank, plastic septic tank, and fibreglass septic tank, most popular and common used are concrete septic tank in household according to their states and local rule and regulation.

**In this regarding, “what is concrete septic tank?”**, Concrete septic tank is simple design, water tight container made of RCC or plain concrete, generally rectangular or round in shape, available in one chamber, two chamber or three chambered used for primary treatment liquid waste.

Typically, a concrete septic tank can hold **500 to 1,250 gallons **of liquid waste. A typical **500-gallon** septic tank (or **750-gallon** septic tank) is adequate for a **two-bedroom** house, a **1,000-gallon** concrete septic tank is adequate for a **three-bedroom** house, and a **1,250-gallon** septic tank is sufficient for **four bedroom** house or a family of 4.

Regarding this, **“what is the septic tank?”,** the septic tank is one chamber or multi- chamber underground compartment either made of RCC concrete, plastic, fiberglass or Steel used for primary treatment of anaerobic digestion of domestic wastewater, fecal material, toilet and excretory product that decompose and change into settleable solid or semi-solid sludge.

**What are septic tank?**

What are septic tank? Septic tank are underwater sedimentation tank for the primary treatment of domestic wastewater and fecal material through the process of biological anaerobic digestion or decomposition and change into settleable solid or semi-solid sludge. Generally house hold septic tank are made of capacity to store 4000- 7500 litres or 1000 – 2000 gallons of effluent or semi solid sludge.

**How big is septic tank?**

Septic tank so big that should have the capacity to retain the household waste water at least for 3 days. Minimum 1,000 gallons capacity of septic tank is sufficient for 3 bedroom house. Minimum depth of Septic tank should not be less than 1.8m and sludge settled down per person – 30 litres/ year.

**How does a septic tank work?**

A septic tank is one, two, three or four compartment, generally 4rth compartment of septic tank used as soak pit for water drain out and goes into the soil, first compartment receiving the waste water, 2nd and 3rd compartment used for anaerobic digestion of waste.

One end of septic tank is connected to inlet waste water pipe and other end with outlet pipe for overflow of water, generally pipe in T shaped allowing waste water to enter and exist without disturbance.

**How does a septic tank work? **A typical septic tank work on the principle of anaerobic digestion or decomposition of waste water and fecal material by the action of several microorganism like bacteria, decompose it and changing the waste into settleable solid or semi-solid sludge.

Waste water enters the first Chamber of the tank, allowing solid to settle and scum to float, the settle solid are anaerobically digested, reducing the volume of solid. The liquid component flows through dividing wall into Second Chamber, where further settlement takes place the excess liquid now in relatively clean and dark in colour come out from outlet pipe and goes into sewage or soak pit.

**What are types of septic tank**

Septic tank are classified into four different types based on number of Chamber or compartment used for manufacturing they are as follows:-

1) One chamber septic tank

2) two chamber septic tank

3) three chamber septic tank

4) four chamber septic tank

Septic tank are classified into four different types based on materials used for manufacturing they are as follows:-

1) concrete septic tank

2) plastic septic tank

3) fiberglass septic tank

4) steel septic tank

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In India, the **standard size** of septic tank used for household and fecal sludge management in **rural & urban area** is (L × H × W):- **1500 × 1000 × 750 mm** ( 5 × 4 × 2.5 feet). A minimum width of 750 mm (2.5 feet) and depth of 1 metre below the outlet capacity of 1,000 litres.

For rectangular septic tank, the length shall be 2 to 4 times the width and for circular septic tank, minimum diameter shall not be less than 1.35m and depth of 1 metre.

In India, Bureau of Indian Standard provided the specification for construction of septic tank. Consists of inlet pipe outlet pipe and ventilation pipe. Inlet pipe collect liquid wastage from pour flush cistern, outlet for expelled the effluent.

The first Chamber of the septic tank should be two – third of total length of septic tank. Over time due to anaerobic digestion, the sludge reduces and portion of solid turns into liquid and gas which Rises to the surface in the form of bubbles, at the top of septic tank ventilation pipe is built to expel the gas produced due to an aerobic digestion of solid wastages.

**Septic tank dimensions**

Number of bedrooms in the house and number of people living there is most important keys factors that determining the dimensions of septic tank there size and capacity.

1000 gallon septic **tank** **dimensions:** **–** **Typical** 1000 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** **8′ ****2″** × **5′** **1″** × **5′** **8″.** A typical 1000 gallon septic tank is 8 feet 2 inches long, 5 feet 1 **inch** **high** and 5 feet 8 inches **wide. It is sufficient for three bedroom house.**

1250 gallon septic **tank** **dimensions:** **–** **Typical** 1250 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** **8′ 6****“** × **5′** 9**“** × **5′** **8″.** A typical 1250 gallon septic tank is 8 feet 6 inches long, 5 feet 9 **inches** **high** and 5 feet 8 inches **wide. It is sufficient for four bedroom house.**

1500 gallon septic **tank** **dimensions:** **–** **Typical** 1500 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** **10****‘ 9****“** × 6**‘** 0**“** × **5′** 5**“.** A typical 1500 gallon septic tank is 10 feet 9 inches long, 6 feet 0 **inch** **high** and 5 feet 5 inches **wide. It is sufficient for four bedroom house.**

500 gallon septic **tank** **dimensions:** **–** **Typical** 500 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** 6**‘ 7****“** × 4**‘** 8**“** × 3**‘** 7**“.** A typical 500 gallon septic tank is 6 feet 7 inches long, 4 feet 8 **inches** **high** and 3 feet 7 inches **wide. It is sufficient for two bedroom house.**

For 5 users, minimum size of septic tank could be (L × H × W):-1.5m × 1m × 0.75m ( 5ft × 3.3ft × 2.5ft). It has tank capacity of 1000 litres of liquid waste.

**Standard septic tank size for 4, 5, 6, 10, 15, 20, 25 and 50 users**

Septic tank is scientifically well designed underground rcc concrete structure used for primary treatment of liquid wastage faecal material and urine into settleable solid or semi solid sludge.

Size of septic tank depends on number of users in different types of houses either it will be residential house or commercial or office building house, if number of user increases then their size of septic tanks should be increased.

**The** **minimum** capacity (volume) **of** **a** septic tank **in** **a normal** **residential** **building** is about 2,000 **liters.**

**Septic tank parameters**

Septic tank parameters: 1) **Size** of septic **tank:- ****The** minimum width should be 750mm (0.75m) or 2.5ft, **the** depth **should** **be** 1,000mm (1m) or **3.3ft,** and **its** length should be **2~4** times **greater** **than** **be** **its** width.

2) Inlet pipe should be fixed inside the tank with stop limb rising above scum level and the bottom limb extending about 300 mm or 1 feet below the top water level. There is a free space of 300mm to 450mm (1 to 1.5 feet) above scum water level for preventing dampness of RCC cover slab.

3) Outlet pipe should be fixed inside the tank with top limb rising above scum level and the bottom limb extending to 1/3rd of the liquid depth below top water level.

4) Ventilation pipe should be fixed above water level at least minimum diameter of 50mm, it should be wrapped properly at top around with mosquitoes proof mesh.

5) floor should be made watertight structure, adequate strength, resistance to earth movement and carry load of its content liquid wastage material, it should be good concreting with minimum grade M20, and some slop towards sludge outlet to facilitate desludging.

6) Wall should be made with first class red brick minimum thickness of 200 mm and it should be plastered with minimum thickness of 12mm.

7) Septic tank consists of one, two or three chamber depending on users, first Chamber of septic tank should be two – third of total length of septic tank.

**Size and types of septic tank according to number of Chamber**

In India, for commercial and residential building septic tank size are kept according to to availability of space. There are two types of septic tank, single chambered septic tank and double chamber septic tank are generally used.

A single chamber septic **tank** **dimensions:** **–** **Typical** a single chamber septic tank dimensions are **(L** **x** **H** **x** W**):** **–** 6**‘ 0****“** × **5′** 0**“** × 2**‘** 6**” (or 6 × 5 × 2.5 feet). **A typical single chamber septic tank is 6 feet long, 5 feet **high** and 2 feet 6 inches **wide.** This **may** be **preferable** if **space** is **limited** and **you** **have** **a** **storage** capacity **of** **at** **least** 2000 **liters** of liquid waste.

A double chamber septic **tank** **dimensions:** **–** **Typical** a double chamber septic tank dimensions are **(L** **x** **H** **x** W**):** **–** 10×7 ×8 feet**. **A typical double chamber septic tank is 7-10 feet long, 7 feet **high** and 6-8 feet **wide. This may be used for **commercial and residential building, a double chamber septic tank is prefered, if sufficient space is available.

**Septic tank size for 5, 10, 15, 20 and 50 users as per IS code**

The **typical size** of a **residential septic tank** is usually around **8.0 feet long x 4.5 feet wide x 6 feet high (2.4m long × 1.35m wide × 1.8m high)** . Your septic tank may be a different size however. Best practice is to find and measure your septic tank for accurate calculations.

Household use of septic tanks and fecal sludge management in rural and urban India, As per IS 2470 – 1963 for all building type, minimum size of septic tank for 5 users should be 1.5m × 0.75m × 1m ( 5ft × 2.5ft × 3.3ft) in respect to their Length, breadth and depth. It has tank capacity of 1000 litres of liquid wastages.

**Standard septic tank size in feet**

The standard septic tank size in feet is (L × W × H):- 5 × 2.5 × 3.3 feet. Typical standard dimensions for septic tanks should be 5 feet long, 2.5 feet wide and 3.3 feet deep. This septic tank with a capacity of 1,000 liters of liquid waste water is ideal for 5 households.

**Standard septic tank size in inches**

The standard septic tank size in inches is (L × W × H):- 60 × 30 × 40 inches. Typical standard dimensions for septic tanks should be 60 inches long, 30 inches wide and 40 inches deep. This septic tank with a capacity of 1,000 liters of liquid waste water is ideal for 5 households.

**Standard septic tank size in meters**

The standard septic tank size in meters are (L × W × H):- 1.5 × 0.75 × 1 meters. Typical standard dimensions for septic tanks should be 1.5 meters long, 0.75 meters wide and 1 meter deep. This septic tank with a capacity of 1,000 liters of liquid waste water is ideal for 5 households.

**Standard septic tank size in mm**

The standard septic tank size in mm are (L × W × H):- 1500 × 750 × 1000 mm. Typical standard dimensions for septic tanks should be 1500 mm long, 750 mm wide and 1000 mm deep. This septic tank with a capacity of 1,000 liters of liquid waste water is ideal for 5 households.

**Standard septic tank size in cm**

The standard septic tank size in cm are (L × W × H):- 150 × 75 × 100 cm. Typical standard dimensions for septic tanks should be 150 cm long, 75 cm wide and 100 cm deep. This septic tank with a capacity of 1,000 liters of liquid waste water is ideal for 5 households.

**Septic tank size for 10 users**

For 10 users, the minimum size of the septic tank is (L × W × H):- 2m × 0.9m × 1m (or 6.56ft × 2.95ft × 3.3ft). Typical standard dimensions of a 10 user septic tank should be 2 meters long, 0.9 meters wide and 1 meter deep. The typical tank capacity of 2000 liters of liquid waste is ideal for 10 users.

**Septic tank size for 15 users**

For 15 users, the minimum size of the septic tank is (L × W × H):- 2m × 0.9m × 1.3m (or 6.56ft × 2.95ft × 4.25ft). Typical standard dimensions of a 15 user septic tank should be 2 meters long, 0.9 meters wide and 1.3 meter deep. The typical tank capacity of 2500 liters of liquid waste is ideal for 15 users.

**Septic tank size for 20 users**

For 20 users, the minimum size of the septic tank is (L × W × H):- 2.3m × 1.1m × 1.3m (or 7.54ft × 3.6ft × 4.25ft). Typical standard dimensions of a 20 user septic tank should be 2.3 meters long, 1.1 meters wide and 1.3 meter deep. The typical tank capacity of 3500 liters of liquid waste is ideal for 20 users.

**Septic tank size for 50 users**

For 50 users, the minimum size of the septic tank is (L × W × H):- 4m × 1.4m × 1.3m (or 13ft × 4.59ft × 4.25ft). Typical standard dimensions of a 50 user septic tank should be 4 meters long, 1.4 meters wide and 1.3 meter deep. The typical tank capacity of 7500 liters of liquid waste is ideal for 50 users.

**How to calculate the size of septic tank you need**

To calculate the size of the septic tank needed, use the **following formula:** C = A + P (rq + ns). Where, **C is capacity** of septic tank, A constant, P = number of users, r = minimum retention time, q = average sewage flow in liters per person per day, n = number of years sludge will stored and S = rate of sludge accumulation in litre per person per year.

For example, In British code, A = 2,000 liters, rq + ns = 180 liters, so rounding formula, we will get C = 2000 litres + 180P.

Suppose we have to find with capacity of septic tank size for 4 users, put this value C = 2000 litres + 180 × 4 = 2720 liters.

**Septic tank size for commercial/ office building**

Household use of septic tanks and fecal sludge management in urban India, for commercial/ office building size of septic tank should be based on office complex of working number of employees. Suppose 100 working person in office/ commercial building. Each person can flush 20 gallon water per day into septic tank, total sewage water = 100×20 gallons, and we know 1 gallon = 3.78litres, so volume of water in litres = 2000× 3.78= 7560 litres, converting into cubic metre = 7.560m3.

**Size of septic tank per person**:- The typical minimum size of **a** septic tank should **be** 350 liters of liquid waste per person. Its capacity should not be less than 2,000 liters. Each person can flush 20 gallon water per day into septic tank.

For **100 employees**, the minimum size of the septic tank for commercial building is (L × W × H):- 4m × 1.5m × 1.3m (13ft × 5ft × 4.25ft). Typical standard dimensions of a 100 user commercial building septic tank should be 4 meters long, 1.5 meters wide and 1.3 meter deep. There is a need of 1 to 1.5ft free space above water level inside septic tank, so overall height should be 6ft including depth have tank capacity of 7500 litres of liquid wastages.

**Septic tank size for residential building**

In India, using Thumb Rule, 4 to 10 users, minimum size of septic tank for residential building should be 2m × 0.9m × 1.3m (6.56ft × 2.95ft × 4.25ft) in respect to their Length, breadth and depth, there is a need of 1 to 1.5ft free space above water level inside septic tank, so overall height should be 6ft including depth have tank capacity of minimum 2000 litres of liquid wastages.

**Septic tank size for 4 users**

For 4 users, the minimum size of the septic tank is (L × W × H):-1.5m × 0.75m × 1.0m (5ft × 2.5ft × 3.3ft). Typical standard dimensions of a 4 user septic tank should be 1.5 meters long, 0.75 meters wide and 1 meter deep. The typical tank capacity of 2000 liters of liquid waste is ideal for 4 users. There is a need of 1 to 1.5ft free space above water level inside septic tank, so overall height should be 5ft including depth. This is considered normal, average, good capacity and sufficient septic tank size for 4 users as it allows pour flush cistern for excretory discharge.

**Septic tank size for 5 users**

For 5 users, the minimum size of the septic tank is (L × W × H):- 2.3m × 1.0m × 1.3m (7.5ft × 3.3ft × 4.25ft). Typical standard dimensions of a 5 user septic tank should be 2.3 meters long, 1 meter wide and 1.3 meters deep. The typical tank capacity of 3000 liters of liquid waste is ideal for 5 users.

**Septic tank size for 6 users**

For 6 users, the minimum size of the septic tank is (L × W × H):- 2.3m × 1.1m × 1.3m (7.5ft × 3.6ft × 4.25ft). Typical standard dimensions of a 6 user septic tank should be 2.3 meters long, 1.1 meter wide and 1.3 meters deep. The typical tank capacity of 3200 liters of liquid waste is ideal for 5 users.

**Septic tank size for 10 users**

For 10 users, the minimum size of the septic tank is 2.7m × 1.1m × 1.3m (9ft × 3.6ft × 4.25ft). Typical standard dimensions of a 10 user septic tank should be 2.7 meters long, 1.1 meter wide and 1.3 meters deep. The typical tank capacity of 4000 liters of liquid waste is ideal for 10 users.

**Septic tank size for 15 users**

For 15 users, the minimum size of the septic tank is 2.7m × 1.4m × 1.3m (9ft × 4.5ft × 4.25ft). Typical standard dimensions of a 15 user septic tank should be 2.7 meters long, 1.4 meter wide and 1.3 meters deep. The typical tank capacity of 5000 liters of liquid waste is ideal for 15 users.

**Septic tank size for 20 users**

For 20 users, the minimum size of the septic tank is 3.1m × 1.4m × 1.3m (10.17ft × 4.5ft × 4.25ft). Typical standard dimensions of a 20 user septic tank should be 3.1 meters long, 1.4 meter wide and 1.3 meters deep. The typical tank capacity of 5600 liters of liquid waste is ideal for 20 users.

**Septic tank size for 25 users**

For 25 users, the minimum size of the septic tank is 3.6m × 1.4m × 1.3m (12ft × 4.5ft × 4.25ft). Typical standard dimensions of a 25 user septic tank should be 3.6 meters long, 1.4 meter wide and 1.3 meters deep. The typical tank capacity of 6500 liters of liquid waste is ideal for 25 users.

**Septic tank size for 30 users**

For 30 users, the minimum size of the septic tank is 4.1m × 1.4m × 1.3m (13.45ft × 4.5ft × 4.25ft). Typical standard dimensions of a 30 user septic tank should be 4.1 meters long, 1.4 meter wide and 1.3 meters deep. The typical tank capacity of 7500 liters of liquid waste is ideal for 30 users.

**Septic tank size for 50 users**

For 50 users, the minimum size of the septic tank is 5m × 1.5m × 1.5m (16.40ft × 5ft × 5ft). Typical standard dimensions of a 50 user septic tank should be 5 meters long, 1.5 meter wide and 1.5 meters deep. The typical tank capacity of 11,000 liters of liquid waste is ideal for 50 users.

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**Concrete septic tank**

There are many option available in market when choosing a septic tank for your home. In Modern era septic tank are made of either industrial plastic, fiberglass and precast concrete. In United States, the building that follow the rule and regulation of local Municipal authority, should have concrete septic tank, plastic tank do not allowed due to risk of floatation and contamination of groundwater.

Concrete septic tank are made of precast concrete, mixture of Portland cement, sand aggregate and water and some amount of reinforcement also be embedded, high quality of concrete mix is used.

Concrete septic tank comply with all building regulation, regardless of region, it is water tight, highly durable, easy to installation process, higher effluent capacity, long life expectancy, never damage during the installation and has no risk of tank collapse during pumping.

**Concrete septic tank 1000 gallon**

There are various suggestion and Recommendation of size of septic tank according to number of users, quantity of waste flow, size of house, square footage, number of bedroom, number of bathroom and according to states and local regulation

Septic tank available in various sizes in market a smaller than 1000 gallon but our recommendation is you can select minimum 1000 gallon of septic tank, it is minimum size requirement.

Concrete septic tank 1000 gallon:- in United States, concrete septic tank are most popular type of septic tank available in the market, 1000 gallon septic tank is most common size for domestic uses, it easily accomodates most of 0-3 bedroom homes.

**1000 gallon concrete septic tank dimensions**

**Typical** 1000 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** **8′ ****2″** × **5′** **1″** × **5′** **8″.** A typical 1000 gallon septic tank is 8 feet 2 inches long, 5 feet 1 **inch** **high** and 5 feet 8 inches **wide. It is sufficient for three bedroom house.**

Size of 1000 gallon septic tank depend on distributor, their size is vary, either contain one chamber or two chamber, some of most popular, dimensions of 1000 gallon reinforced cement precast concrete septic tank are around 5′ 1″ × 8′ 2″ × 5′ 8″, in which depth of septic tank = 5′ 1″, length = 8′ 2″ and width = 5′ 8″. This is ideal, perfect, normally used and standard size, dimension and specification of 1000 gallon concrete septic tank.

**Weight of 1000 gallon concrete septic tank**

The typical weight of a 1000 gallon concrete septic tank is about 9,000 pound (or 4.5 US tons. The weight can vary depending on distributor, size of septic tank, either one chamber or two chamber, quantity of steel reinforcement embedded in it and compressive strength of concrete.

**1000 gallon concrete septic tank specification**

● Overall depth = 5′ 1″

● Overall length = 8′ 2″

● Overall width = 5′ 8″

● Weight = 9000 lbs

● Excavation depth = 9 1/2′

● Strength = 4000 psi

**Concrete septic tank 1250 gallon**

It is made of steel reinforcement precast concrete, generally 1250 gallon concrete septic tank is common choice for mid size home with 3 to 4 bedroom house which have single family or multi family dwelling.

**1250 gallon concrete septic tank dimensions**

**Typical** 1250 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** **8′ 6****“** × **5′** 9**“** × **5′** **8″.** A typical 1250 gallon septic tank is 8 feet 6 inches long, 5 feet 9 **inches** **high** and 5 feet 8 inches **wide. It is sufficient for four bedroom house.**

Their dimensions depend on distributor, their size is vary, either contain one chamber or two chamber, some of most popular, dimensions of 1250 gallon reinforced cement precast concrete septic tank are around 5′ 9″ × 8′ 6″ × 5′ 8″, in which depth of septic tank = 5′ 9″, length = 8′ 6″ and width = 5′ 8″. This is ideal, perfect, normally used and standard size, dimension and specification of 1250 gallon concrete septic tank.

**Weight of 1250 gallon concrete septic tank**

The typical weight of a **1,250 gallon** concrete septic tank is about **11,000 pound** (or 5.5 US tons. Their weight can vary depending on distributor, size of septic tank, either one chamber or two chamber, quantity of steel reinforcement embedded in it and compressive strength of concrete, but most common type of 1250 gallon concrete septic tank generally weight around 11000 lbs.

**1250 gallon concrete septic tank specification:-**

● Overall depth = 5′ 9″

● Overall length = 8′ 6″

● Overall width = 5′ 8″

● Weight = 11000 lbs

● Excavation depth = 11 1/2′

● Strength = 4000 psi

**Concrete septic tank 1500 gallon**

It is made of steel reinforcement precast concrete, generally 1500 gallon concrete septic tank is common choice for large home with 5 to 6 bedroom house, it can easily accommodates multi family dwelling.

**1500 gallon concrete septic tank dimensions**

**Typical** 1500 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** **10****‘ 9****“** × 6**‘** 0**“** × **5′** 5**“.** A typical 1500 gallon septic tank is 10 feet 9 inches long, 6 feet 0 **inch** **high** and 5 feet 5 inches **wide. It is sufficient for four bedroom house.**

Its size depend on distributor, their size is vary, either contain one chamber or two chamber, some of most popular, dimensions of 1500 gallon reinforced cement precast concrete septic tank are around 6′ × 10′ 9″ × 5′ 5″, in which depth of septic tank = 6′, length = 10′ 9″ and width = 5′ 5″. This is ideal, perfect, normally used and standard size, dimension and specification of 1500 gallon concrete septic tank.

**Weight of 1500 gallon concrete septic tank**

The typical weight of a **1,500 gallon** concrete septic tank is about **12,000 pound** (or 6 US tons). Their weight can vary depending on distributor, size of septic tank, either one chamber or two chamber, quantity of steel reinforcement embedded in it and compressive strength of concrete, but most common type of 1500 gallon concrete septic tank generally weight around 12000 lbs.

**1500 gallon concrete septic tank specification:-**

● Overall depth = 6′

● Overall length = 10′ 9″

● Overall width = 5′ 5″

● Weight = 12000 lbs

● Excavation depth = 12

● Strength = 4000 psi

**Concrete septic tank 500 gallon**

It is made of steel reinforcement precast concrete, generally 500 gallon concrete septic tank is common choice for small home with 0 to 2 bedroom house, it can easily accommodates single family dwelling.

**500 gallon concrete septic tank dimensions**

**Typical** 500 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** 6**‘ 7****“** × 4**‘** 8**“** × 3**‘** 7**“.** A typical 500 gallon septic tank is 6 feet 7 inches long, 4 feet 8 **inches** **high** and 3 feet 7 inches **wide. It is sufficient for two bedroom house.**

It’s depend on distributor, their size is vary, it contain one chamber, some of most popular, dimensions of 500 gallon reinforced cement precast concrete septic tank are around 56″ × 79″ × 45″, in which depth of septic tank = 56″, length = 79″ and width = 45″. This is ideal, perfect, normally used and standard size, dimension and specification of 500 gallon concrete septic tank.

**Weight of 500 gallon concrete septic tank**

The typical weight of a **500 gallon** concrete septic tank is about **5,000 pound** (or 2.5 US tons. Their weight can vary depending on distributor, size of septic tank, quantity of steel reinforcement embedded in it and compressive strength of concrete, but most common type of 500 gallon concrete septic tank generally weight around 5000 lbs.

**500 gallon concrete septic tank specification:-**

● Overall depth = 56″

● Overall length = 79″

● Overall width = 45″

● Weight = 5000 lbs

● Excavation depth = 8′

● Strength = 4000 psi

**600 gallon concrete septic tank specification:-**

● Overall depth = 62″

● Overall length = 79″

● Overall width = 48″

● Weight = 5000 lbs

● Excavation depth = 8′

● Strength = 4000 psi

**Typical** 600 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** 6**‘ 7****“** × 4**‘** 0**“** × 5**‘** 2**“.** A typical 600 gallon septic tank is 6 feet 7 inches long, 4 feet 0 **inches** **high** and 5 feet 2 inches **wide. **

**2500 gallon concrete septic tank specification:-**

● Overall depth = 68″

● Overall length = 144″

● Overall width = 78″

● Weight = 16000 lbs

● Excavation depth = 12′

● Strength = 4000 psi

**Typical** 2500 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** 12**‘ 0****“** × 6**‘** 6**“** × 5**‘** 8**“.** A typical 2500 gallon septic tank is 12 feet 0 inches long, 6 feet 6 **inches** **high** and 5 feet 8 inches **wide. **

**3500 gallon concrete septic tank specification:-**

● Overall depth = 98″

● Overall length = 144″

● Overall width = 78″

● Weight = 20000 lbs

● Excavation depth = 12′

● Strength = 4000 psi

**Typical** 3500 gallon septic tank dimensions are **(L** **x** **H** **x** W**):** **–** 12**‘ 0****“** × 6**‘** 6**“** × 8**‘** 2**“.** A typical 3500 gallon septic tank is 12 feet 0 inches long, 6 feet 6 **inches** **high** and 8 feet 2 inches **wide. **

**How to calculate septic tank capacity in gallon**

To calculate the capacity of the septic tank in gallon, use the **following formula:** Capacity of septic tank in gallon = L × W × H in feet × 7.5. Where, **C is capacity** of septic tank, L = Length in feet, W = Width in feet & H = height.

Measures the septic tank dimensions (L = 8 ft, width = 5 ft & depth = 4 ft):- measures the length, depth and width of septic tank, suppose a septic tank is 8 ft long by 5 feet wide by 4 feet depth

● Calculate volume of septic tank (V = 8ft × 5ft × 4ft = 160 CF):- calculate volume of concrete septic tank in cubic feet by multiplying length, width and their depth, as volume of septic tank = 8ft × 5ft × 4ft = 160 cubic feet

● Calculate septic tank capacity in gallon by multiplying 7.5 to cubic feet (160 ×7.5 = 1200 gallons):- you can calculate septic tank capacity in gallon by multiplying 7.5 to volume of septic tank in cubic feet, such as 160 ×7.5 = 1200 gallons, this is the septic tank capacity in gallon

Regarding this, How to calculate septic tank capacity in gallon, you can calculate septic tank capacity in gallon by calculating the volume of septic tank in cubic feet by multiplying its dimension length width and their depth, such as volume = L × W × D, suppose it is 100 CF, then after you can convert cubic feet in gallon by multiplying 7.5, such as 100 × 7.5 = 750 gallon, this is the capacity of septic tank in gallon.

**Septic tank size for 3 bedroom house**

In United States, building that follow the local rule and regulation, for **single** family **home** use, **the** size of **the** septic tank needed for **a 3 bedroom** house **can** be around **1,000 gallons**, it easily **accommodates** a single family dwelling.

**Septic tank size for 4 bedroom house**

In United States, building that follow the local rule and regulation, for **single** or multi family **home** use, **the** size of **the** septic tank needed for **a 4 bedroom** house **can** be around **1,200 gallons**, it easily **accommodates** a single or multi family dwelling.

**Septic tank size for 5 bedroom house**

In United States, building that follow the local rule and regulation, for multi family **home** use, **the** size of **the** septic tank needed for **a 5 bedroom** house **can** be around **1,500 gallons**, it easily **accommodates** a mid- large house for multi family dwelling.

**Septic tank size for 6 bedroom house**

In United States, building that follow the local rule and regulation, for multi family **home** use, **the** size of **the** septic tank needed for **a 6 bedroom** house **can** be around **1,750 gallons**, it easily **accommodates** a large house for multi family dwelling.

**Septic tank size for 7 bedroom house**

In United States, building that follow the local rule and regulation, for multi family **home** use, **the** size of **the** septic tank needed for **a 7 bedroom** house **can** be around 2,00**0 gallons**, it easily **accommodates** a large house for multi family dwelling.

**What size septic tank do I need**

Number of bedroom, number of bathroom, number of person living in the house, square footage of house, type of building residential, office, commercial and rule and regulation of states and local authority are the most important key factor that determining the the size of septic tank you need.

Number of bathroom according to a square footage of house, on average less than 1500 square feet house probably have 1 – 2 bathrooms, for this generally you need 750 gallon of septic tank, for less than 2500 square feet house have 3 bathrooms, for this generally you need 1000 gallon of septic tank, for less than 3500 square feet house have 4 bathrooms, for this generally you need 1250 gallon of septic tank and for less than 4500 square feet house have 5 bathrooms, for this generally you need 1500 gallon of septic tank.

Number of bathroom according to septic tank size, a septic tank of capacity 750 gallon is easily accommodates and sufficient for 1-2 bathrooms in the house, 1000 gallon septic tank for 3 bathrooms, 1250 gallon septic tank for 4 bathrooms, 1500 gallon septic tank for 5 bathrooms, 1750 gallon septic tank for 6 bathrooms and 2000 gallon septic tank for 7 bathrooms.

**How many bedrooms does a 500 gallon septic tank support**

The correct size of septic tank depending on square footage area of the house, number of bedrooms and number of people living there, generally, on average, a septic tank of 500 gallon can support 1 to 2 bedrooms house less than 1500 square feet.

**How many bedrooms does a 750 gallon septic tank support**

The correct size of septic tank depending on square footage area of the house, number of bedrooms and number of people living there, generally, on average, a septic tank of 750 gallon can support 1 to 2 bedrooms house less than 1500 square feet.

**How many bedrooms does a 1000 gallon septic tank support**

The correct size of septic tank depending on square footage area of the house, number of bedrooms and number of people living there, generally, on average, a septic tank of 1000 gallon can support 3 bedrooms house less than 2500 square feet.

**How many bedrooms does a 1250 gallon septic tank support**

The correct size of septic tank depending on square footage area of the house, number of bedrooms and number of people living there, generally, on average, a septic tank of 1250 gallon can support 4 bedrooms house less than 3500 square feet.

**How many bedrooms does a 1500 gallon septic tank support**

The correct size of septic tank depending on square footage area of the house, number of bedrooms and number of people living there, generally, on average, a septic tank of 1500 gallon can support 5 bedrooms house less than 4500 square feet.

**How many bedrooms does a 1750 gallon septic tank support**

The correct size of septic tank depending on square footage area of the house, number of bedrooms and number of people living there, generally, on average, a septic tank of 1750 gallon can support 6 bedrooms house.

**How many bedrooms does a 2000 gallon septic tank support**

The correct size of septic tank depending on square footage area of the house, number of bedrooms and number of people living there, generally, on average, a septic tank of 2000 gallon can support 7 bedrooms house.

**How many bathrooms does a 500 gallon septic tank support**

The correct size of residential septic tank depending on square footage area of the house, number of bathrooms and number of people living there, generally, on average, a septic tank of 500 gallon can support 1 to 2 bathrooms in the house less than 1500 square feet.

**How many bathrooms does a 750 gallon septic tank support**

The correct size of residential septic tank depending on square footage area of the house, number of bathrooms and number of people living there, generally, on average, a septic tank of 750 gallon can support 1 to 2 bathrooms in the house less than 1500 square feet.

**How many bathrooms does a 1000 gallon septic tank support**

The correct size of residential septic tank depending on square footage area of the house, number of bathrooms and number of people living there, generally, on average, a septic tank of 1000 gallon can support 3 bathrooms in the house less than 2500 square feet.

**How many bathrooms does a 1250 gallon septic tank support**

The correct size of residential septic tank depending on square footage area of the house, number of bathrooms and number of people living there, generally, on average, a septic tank of 1250 gallon can support 4 bathrooms in the house less than 3500 square feet.

**How many bathrooms does a 1500 gallon septic tank support**

The correct size of residential septic tank depending on square footage area of the house, number of bathrooms and number of people living there, generally, on average, a septic tank of 1500 gallon can support 5 bathrooms in the house less than 4500 square feet.

**How many bathrooms does a 1750 gallon septic tank support**

The correct size of residential septic tank depending on square footage area of the house, number of bathrooms and number of people living there, generally, on average, a septic tank of 1750 gallon can support 6 bathrooms in the house.

**How many bathrooms does a 2000 gallon septic tank support**

The correct size of residential septic tank depending on square footage area of the house, number of bathrooms and number of people living there, generally, on average, a septic tank of 2000 gallon can support 7 bathrooms in the house.

**What size septic tank do I need for 2 bathrooms**

Number of bathroom in the house and number of people living there is most important keys factors that determining the size of septic tank, most residential septic tanks range in the size from 500 to 1250 gallons, generally, on average, you need 750 gallon size and capacity of septic tank for a 2 bathrooms

**What size septic tank do I need for 3 bathrooms**

Number of bathroom in the house and number of people living there is most important keys factors that determining the size of septic tank, most residential septic tanks range in the size from 500 to 1250 gallons, generally, on average, you need 1000 gallon size and capacity of septic tank for 3 bathrooms.

**What size septic tank do I need for 4 bathrooms**

Number of bathroom in the house and number of people living there is most important keys factors that determining the size of septic tank, most residential septic tanks range in the size from 500 to 1250 gallons, generally, on average, you need 1250 gallon size and capacity of septic tank for 4 bathrooms.

**What size septic tank do I need for 5 bathrooms**

Number of bathroom in the house and number of people living there is most important keys factors that determining the size of septic tank, generally, on average, you need 1500 gallon size and capacity of septic tank for 5 bathrooms.

**What size septic tank do I need for 6 bathrooms**

Number of bathroom in the house and number of people living there is most important keys factors that determining the size of septic tank, generally, on average, you need 1750 gallon size and capacity of septic tank for 6 bathrooms.

**What size septic tank do I need for 7 bathrooms**

Number of bathroom in the house and number of people living there is most important keys factors that determining the size of septic tank, generally, on average, you need 2000 gallon size and capacity of septic tank for 7 bathrooms.

**What size septic tank do I need for a 2 bedroom house**

Number of bedrooms in the house and number of people living there is most important keys factors that determining the size of septic tank, most residential septic tanks range in the size from 500 to 1250 gallons, generally, on average, you need 750 gallon size and capacity of septic tank for a 2 bedroom house.

**What size septic tank do I need for a 3 bedroom house**

Number of bedrooms in the house and number of people living there is most important keys factors that determining the size of septic tank, most residential septic tanks range in the size from 500 to 1250 gallons, generally, on average, you need 1000 gallon size and capacity of septic tank for a 3 bedroom house.

**What size septic tank do I need for 4 a bedroom house**

Number of bedrooms in the house and number of people living there is most important keys factors that determining the size of septic tank, most residential septic tanks range in the size from 500 to 1250 gallons, generally, on average, you need 1250 gallon size and capacity of septic tank for 4 bedrooms house.

**What size septic tank do I need for a family of 4**

Number of family members and number of bathroom in the house is most important keys factors that determining the size of septic tank, on average, generally you need 750 gallons size and capacity of septic tank for a family of 4 users.

**Conclusion:**

The **typical standard size** of a **residential septic tank** is usually around **8.0 feet long x 4.5 feet wide x 6 feet high (2.4m long × 1.35m wide × 1.8m high)** . Your septic tank may be a different size however. Best practice is to find and measure your septic tank for accurate calculations.