The curved pieces of drainpipe underneath your sink and basin often referred to as P-traps, do a lot of dirty work. Over time they crack, leak, become corroded or get plugged with years of amassed soap and grease. This guide will explain how to change a plumbing trap. When replacing a plumbing trap, you should use the same type of trap you remove. For example, use plastic for plastic.

How to change a plumbing trap

  1. Turn off the water stops. This is so that no one can turn on the tap while the trap is being removed. Make sure there is a clear work area and place a bucket under the trap to catch water.
  2. Inspect the trap. If there is a nut located on the lowest part of the inverted ‘P’, unscrew it with a pair of pliers. Let the water drain out into the bucket.
  3. Unscrew the nuts holding the P-trap by hand. Grip the trap tight with one hand and turn each nut counterclockwise until they start to loosen. You must unscrew two nuts to remove the trap.
  4. Remove the P-trap by pushing the fixings out of the way and pulling down on the section of the trap that connects to the tailpipe. If the trap is still full, place the bucket under the trap opening before you attempt this. Once that end of the trap is free, the other end should pull away from the drainpipe with little effort.
  5. You can now install your new P-trap using the nuts provided. Once installed, turn the water back on and give it a test. Ensure that you continue to complete regular maintenance on your drainage system.

    Plumbing trap

If you would like any extra advice or assistance regarding P-traps, call our drainage experts on 01752 692 221 who will help you to complete your project.

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