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Reconnect Plumbing — Inspect and Reinstall the P-Trap

Beginner

Part of project

How to Clean Out a Bathroom Sink P-Trap · Step 5 of 6

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In this video

Reconnect the tailpiece and P-trap to the bottom of the newly installed sink strainer. Slide the slip nuts up and hand-tighten them onto the threads. Ensure the new tailpiece washer is correctly seated.

Goal: Reattach the drain pipes

  • Hand-tightening is often sufficient, but have pliers ready in case a slight additional turn is needed to stop a leak.

Used in this video

  • Channel-lock Pliers (brand: Unspecified, Tool Type: Pipe wrench, Power Source: Manual) · optionalSlightly tightening the slip nuts if they leak after hand-tightening.
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The Plumbers Plunger

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FAQs

How long does it typically take to clean a bathroom sink P-trap, and is it suitable for a DIY beginner?

This project usually takes 30-60 minutes for a beginner, including preparation and cleanup. It is considered a beginner-level DIY task because it requires basic tools and mechanical skills, primarily focused on proper loosening, cleaning, and tightening techniques for plumbing fixtures.

What's the most common mistake when reassembling the P-trap, and how can I avoid leaks?

The most common mistake is not correctly seating the slip joint washers or overtightening the nuts, which can crack plastic components. Ensure all washers are clean and properly aligned before hand-tightening the nuts, then give them a quarter-turn more with pliers for a secure, leak-free seal.

Do I really need Channellock pliers, or can I use other tools to loosen the P-trap nuts?

While Channellock pliers are recommended for their strong grip and adjustability, you can often use a pipe wrench or a large pair of adjustable pliers if you don't have them. For plastic nuts, you might even be able to loosen them by hand initially, but be cautious not to damage them.

What safety precautions should I take when cleaning out the P-trap?

Always wear protective gloves to shield your hands from grime, bacteria, and potential chemical residue. Have your bucket ready and directly underneath to catch all water and debris, preventing spills and exposure to stagnant water. Work in a well-lit area.

Transcript
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And to push out any extra putty between the sink and the strainer. To hedge my bets, I did put two wraps of plumbers tape around these threads. When the tailpiece washer is compressed against the bottom of the strainer, it should make a tight seal. If I have any leaks, I can tighten the connections down with the wrench a little bit.

Auto-generated transcript. May contain errors.