How To Install P Trap For Bathroom Sink

How to Install a P-Trap for a Bathroom Sink

A P-trap is a U-shaped pipe that is installed under a sink to trap water and prevent sewer gases from backing up into the bathroom. Installing a P-trap is a relatively simple task that can be completed in a few minutes with the right tools and materials.

Tools and Materials

P-trap
Slip joint nuts (2)
Slip joint washers (2)
Adjustable wrench
Plumber's putty
Bucket
Rags

Instructions

Turn off the water supply to the sink. There is usually a shut-off valve under the sink that can be turned with a screwdriver or pliers.
Disconnect the old P-trap. Loosen the slip joint nuts on either side of the P-trap with an adjustable wrench. Be careful not to drop the nuts or washers into the drain.
Clean the drainpipe. Use a rag to wipe away any dirt or debris from the drainpipe. If the drainpipe is clogged, you can use a drain snake to clear it.
Apply plumber's putty to the new P-trap. Roll a small piece of plumber's putty into a snake and wrap it around the threads of the P-trap. This will help to create a watertight seal.
Install the new P-trap. Hand-tighten the slip joint nuts onto the P-trap. Do not overtighten the nuts, as this could damage the P-trap.
Turn on the water supply to the sink. Check for leaks around the P-trap. If you see any leaks, tighten the slip joint nuts until the leak stops.
Test the drain. Pour a cup of water into the sink and watch it drain. The water should flow smoothly and quickly through the drain.

Troubleshooting

If you are having trouble installing a P-trap, here are a few things you can try:

Make sure that the P-trap is the right size for the sink. The P-trap should be the same size as the drainpipe.
Make sure that the slip joint nuts are tight enough. If the nuts are not tight enough, the P-trap could leak.
Make sure that the plumber's putty is applied correctly. The plumber's putty should be wrapped around the threads of the P-trap evenly.
If you are still having trouble, you can call a plumber for help.