Septic Tank With No Bottom

Note that this is 2 inches lower than the bottom of the septic tank inlet opening.

Septic tank with no bottom.

The solids stay in the tank while the wastewater is discharged to the drainfield for further treatment and dispersal. The bottom of the septic tank outlet pipe is 40 inches above the bottom of the septic tank. We also provide a master index to this topic or you can try the page top or bottom search box as a quick way to find information you need. For clear understanding here we designing a septic tank for 8 people in a house which get filled in 10 days.

The inlet pipe collects the water waste in the septic tank long enough that the solid and liquid waste is separated from each other. Its job is to hold the wastewater long enough to allow solids to settle down to the bottom forming sludge while the oil and grease floats to the top as scum. The septic tank is a buried water tight container usually made of concrete fiberglass or polyethylene. A buried watertight tank designated and constructed to receive and partially treat raw domestic sanitary wastewater.

The tank is connected with two pipes for inlet and outlet. Septic tank consists of top slab bottom slab with pcc bed shear walls around the tank and a top cover opening to check the level of waste water. Below are the septic tank design calculations. The septic tank outlet should always be a bit lower than the septic tank inlet othewise sewage would run backwards into the septic tank inlet pipe and would clog the system.

How to design septic system.