Replace a P-Trap

plumbing Replace a P Trap
That u-shaped piece of pipe under your sink is called a p-trap. They can get clogged which requires replacing or cleaning out the p-trap. Since you are already pulling it out, why not install a no-clog p-trap so you won’t ever have to worry about the replacing or fixing your p-trap again.
What is a P-Trap
It’s design has two purposes: First, to allow the water from the sink to flow out and keep noxious gas from coming in, and second, to catch items that might go down the drain (wedding rings) before they are swept away. Over time this p-trap can become plugged with hair, dirt, and other debris and the sink will start to drain very slowly.


There is a new product we saw at this years International Builders Show called the PermaFLOW. This p-trap promises keep your drain and pipes clear from debris by implementing a dial that you can turn externally which moves a paddle inside that will help clear your p-trap if it’s clogged.
It’s also clear so you can see if you’ve got missing rings or valuables that may have fell down the drain without tearing apart your plumbing.
If you aren’t fortunate enough to have a Permaflow you have a few options to clear your p-trap or replace it.
Draino or liquid plumber can sometimes help dislodge a small blockage but a better option is to use a snake or something called a zip-it. We don’t recommend using a plunger as that can push the blockage deeper into your plumbing. When you’ve exhausted these options you should check out the p-trap.
In less than an hour you can remove the trap, clean it, and re-install it.
Just follow these steps to replace your p-trap:
1. Turn off the shut-off valves to water.
2. With a bucket underneath, remove the p-trap by loosening slip nuts at both ends. Be careful not to twist or turn the pipe arm that runs from the wall.
3. Install new p-trap by tightening slip nuts at each end from the sink to the wall.
4. Turn the shut-off valves back on.
5. Turn on the faucet and check for leaks.

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timothy dahl profile Replace a P Trap

Timothy Dahl

Founder/EIC at Charles & Hudson
Timothy’s background includes stints at This Old House, ELLE DECOR, Metropolitan Home and Woman’s Day. His work has been published on Wired Design, Bob Vila, DIY Network, The Family Handyman and Popular Mechanics and he has been featured on the Martha Stewart radio show and as a speaker at the ALT Design Summit, K/BIS and the National Hardware Show.
timothy dahl profile Replace a P Trap

Latest posts by Timothy Dahl (see all)

  • Varnette Jones

    Is it possible to have an odor coming from P-Trap?

  • Carmelo Lisciotto

    Good post.
    – Carmelo Lisciotto

  • Greg

    I am installing a pedestal sink and want to have the exhaust hidden inside the base, but the p trap will have to be below the floor, therefore is there a distance as to how far the p trap must be situated.

  • http://hypro-drains.com/ Georgetown Plumber

    Wow there’s nothing more to say. Those videos are great and if you follow all these steps everyone should be able to do that kind of job pretty easily.

  • Brit plumber

    this trap has no clean out opening at the bottom. makes it easier to clean the blockages rather than remove the whole U bend

  • http://homeinfo101.com/ Scott B

    This sounds like it would be a great idea. Cleaning out those Ptraps can be really gross sometimes with all the stuff that gets in there.