About Plumbing Traps

Traps –

A Trap is a device which is used to prevent sewer gases from entering the building.

Common gases that are produced in a sewage system.

 1-Methane

 2- Hydrogen sulphide

 3- Nitrogen Sulphide

 4- Carbon monoxide

Depending upon the shape are classified as:

1-P Trap- This trap is used with Indian water closet, is used for outlet through the wall.

2-Q Trap-This trap is used in toilet under water closet.

3-S Trap - Similar to P Trap and is used for fixing water closet in toilets (through the floor)   

           

4-Nahni/Floor Trap- This trap is provided in the floor to collect waste water from washbasin,  shower, sink, bathroom.

5-Gully trap- These traps are constructed outside the building to carry waste water discharge from wash basin, sinks, bathrooms etc and connected to the nearest building drain/sewer so that foul gases from sewer do not come to the house.

6-Intercepting trap- This is provided at the last main hole.

7-Bottle Trap- This Trap is used below washbasin and sinks to prevent entry of foul gases.