How To Calculate The Size And Capacity Of The Septic Tank - Lceted

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SEPTIC TANK SHAPE, SIZE & DIMENSIONS

A septic tank is a device that treats wastewater from water closets. In other words, it is a waterproof single-storey, underground tank in which the sewage is stored for a sufficiently long period of time, allowing for the practical digestion of sediment and settled sediments suspended by anaerobic bacterial activity.

Septic Tank

Also use: Water-Sump Tank Calculator | Tank Volume Calculator | Sump Volume Calculator

SHAPE OF SEPTIC TANK

The simplest form of septic tank is a single box, rectangular or cylindrical shape. The shape of the septic tank affects the flow velocity of the wastewater and sludge accumulation.

The dimension of the septic tank should not be too deep. This is because it may cause a short circuit of the inlet and outlet flows.

The septic tank has a large surface area and sufficient depth should always be desired.

The rectangular single box tank (three times its width and length) is the most favourable.

In some cases, a cylindrical shape with the appropriate size may also be the best choice.

SIZE OF SEPTIC TANK

DIMENSIONS

WEIGHT (kg)

ANCHOR WEIGHT (kg)

SOIL COVER (IN)

5000 gal -18928 liter

17’ L x 8’ W x7.75’ H

41400

30850

24

3000 gal - 11356 liter

13.75’ L x 7. 67‘W x 6.41’H

20300

23320

23

2600 gal - 9842 liter

12.25’L x 7.5’W x 6.08’H

18100

20625

24

2000 gal – 7570 liter

13.5’L x 6.5’W x 5.33’H

16100

15675

19

1600 gal – 6056 liter

12.08’L x 6.5’W x 5.08’H

14000

11270

16

1200 gal – 4542 liter

9.25’L x 6.5’W x 5.08’H

11400

9532

17

1000 gal – 3785 liter

Low Profile

10’L x 67’W x 57’H

9500

8705

17

1000 gal – 3785 liter

Heavy Duty

8’L x x 6.5’W x 5.08’H

9200

8945

18

800 gal – 3028 liter

8’L x 67’W x 57’H

8000

6560

16

600 gal – 2271.25 liter

6.5’L x 56’W x 60’H

6600

3810

14

1600/1400 gal - 6056/5299 liter

14.5’L x 90’W x 73’H

23000

22410

22

1250/750 gal – 4730/2839 liter

13.5’L x 6.5’W x 5.33’H

16400

15725

19

1000/600 gal – 3785/2271 liter

12.08’L x x 6.5’W x 5.08’H

14700

12705

17

How To Calculate The Size And Capacity Of The Septic Tank In Gallons?

How do we calculate the gallon volume a septic tank can deliver based on the simple measurements we can make?

Generally, the residential septic tank is typically 4.5 feet wide x 8.0 feet long x 6 feet high. Your septic tank may be a different size. The best practice is to find and measure the septic tank to make correct calculations.

Tanks are generally buried 4 inches to 4 feet deep, depending on local site conditions, shape, slope, and other factors.

Here is the basic math for calculating the capacity (volume) of the septic tank in gallons. Measurements taken on the internal dimensions of the septic tank are in feet.

HOW TO CALCULATE THE SEPTIC TANK CAPACITY IN GALLONS

Septic Tank In Rectangular

Length x Width x Depth in feet x 7.5 = gallons

Septic Tanks In Round

3.14 x radius squared x depth (all in feet) = cubic capacity.

Cubic capacity x 7.5 = gallons capacity.

Septic Tank In Rectangular (alternative method 1)

Length x Width x Depth in feet / .1337 = gallons

Septic Tanks In Round (alternative method 2)

Length x width in inches / 231 = gallons per inch of septic tank depth.

Multiply this number by septic tank depth in inches to get gallons

Notes To The Table Above:

These simple constants and the formula for sizing a rectangular or round tank can help convert the size of a septic tank into cubic feet of sewage:

·One gallon = 231 cubic inches

·One gallon = 0.1337 cubic feet.

·1 cubic foot = 7.48 gallons

·Volume of a cylinder = Pi x radius2 x depth

Where,

Radius = half the diameter

Pi = 3.1416

·Volume of a rectangle = Length x Width x Depth

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