Grease should not be allowed to enter the normal drainage system.

What is the temperature condition required for hydrogen sulphide formation?

What is the preferred size of water closet pan?

Which of these is negative effect owing to the drier soil conditions?

What is the exposure limit of H2S in a day?

What is the expected depth tolerance in bricks?

What is the depth of concrete required for half-round channels for surface drains?

The European WC contains attached trap.