What is the shape of the septic tank?

The house sewer should always be ___

What is the number of coats of paint required for manhole covers?

What is the temperature condition required for hydrogen sulphide formation?

Submersible pumps require high maintenance.

House drainage should be laid by the side of the building.

What is the flow velocity condition required for the formation of hydrogen sulphide?

When was SWMM developed?