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Septic Tank Size, Shape and Dimensions With Table

by Jason Leave a Comment

What Should Be The Septic Tank Size and Dimension

I will discuss about septic tank size, shape and dimensions in this article. The shape of the tank influences the velocity of waste water flowing through the tank as well as the depth of sludge accumulation. If the septic tank dimension is too deep then the other tank dimensions will be too small, which might result in short circuiting of the inlet and outlet flow, thereby shortening the detention time. Conversely if the septic tank dimension is too shallow, the clear space depth will be too small for the detention of the settle-able solids. However, tanks with greater surface area and of reasonable depth are preferred, because increased liquid surface area increases surge storage capacity. These surges of flow through the tank diminish as the surface area increases.

Septic Tank Size, Dimenstion
Septic Tank

Septic Tank Shape

A rectangular septic tank has been reported to be better than a square septic tank, while long narrow tanks are more satisfactory. Tanks of cylindrical shape of appropriate septic tank sizes are also reported to be satisfactory in some cases, and are less costly to install. However, a rectangular shape for a single compartment tank is most favored with a length three times its width.

Table of Septic Tank Sizes, Dimensions & Weights

Below is a table provided with columns of septic tank sizes, septic tank dimensions, relative tank weights & covered soil.

Septic Tank SizeDimensionsWeight (lbs)Anchor Weight (lbs)Soil Cover (in)
5000 gal204″L x 96″W x 93″H41,40030,85024
3000 gal165″L x 92″W x 76″H20,30023,32023
2600 gal147″L x 90″W x 73″H18,10020,62524
2000 gal162″L x 78″W x 64″H16,10015,67519
1600 gal145″L x 78″W x 61″H14,00011,27016
1200 gal111″L x 78″W x 61″H11,4009,53217
1000 gal Low Profile120″L x 67″W x 57″H9,5008,70517
1000 gal Heavy Duty96″L x 78″W x 61″H9,2008,94518
800 gal96″L x 67″W x 57″H8,0006,56016
600 gal78″L x 56″W x 60″H6,6003,81014
1600/1400 gal174″L x 90″W x 73″H23,00022,41022
1250/750 gal162″L x 78″W x 64″H16,40015,72519
1000/600 gal145″L x 78″W x 61″H14,70012,70517

You can check my other posts on Ventilated Pit Latrines and Simple Pit Latrines.

Filed Under: Environmental enginering

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