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Reconnect Drain Pipes — Reassemble the P-Trap

Beginner90 mins

Part of project

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

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In this video

Reconnect the drain pipes. Apply a pipe thread sealant to the threads of the slip-joint nuts and gaskets to ensure a leak-proof connection. Attach the tailpiece to the basket strainer, and then connect the P-trap. Hand-tighten the nuts first, then use channel-lock pliers to give them a final quarter-turn to snug them up. Do not overtighten plastic nuts.

Goal: Complete the plumbing connection

Used in this video

  • Channel-lock Pliers (brand: Unspecified, Tool Type: Pliers)Tightening the slip-joint nuts.
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FAQs

What tools and materials do I absolutely need for this project, and are there any common household items that can substitute?

You'll primarily need Channellock pliers, a bucket, and a brush. A towel is also crucial for managing spills. While specific plumbing washers are listed, you might have a similar brush for cleaning, but proper pliers and a bucket are essential. Do not substitute specific plumbing washers.

Are there any important safety precautions or warnings I should consider before I start cleaning my P-trap?

Always turn off the water supply to the sink before starting to prevent unexpected water flow. Wear gloves to protect your hands from grime, bacteria, and any cleaning solutions you might use. Have plenty of towels on hand for spills, and work in a well-ventilated area if using strong cleaning agents.

This project is labeled 'beginner' and estimated at '90 minutes.' Is that realistic for someone with limited plumbing experience?

Yes, this is a very beginner-friendly project, and the 90-minute estimate is generally realistic. It accounts for gathering tools, disassembling, cleaning, and reassembling. If you encounter seized nuts or need to replace old, brittle washers (like the Oatey rubber washers), it might take a bit longer.

My sink still leaks after I reinstalled the P-trap. What's the most common reason for this, and how can I fix it?

The most common reason for leaks after reinstallation is improperly seated or worn-out slip-joint washers. Disassemble the connections, check that the rubber washers (such as Oatey 1-1/2 in. rubber washers) are correctly oriented, not cracked, and properly seated within the slip nuts. Hand-tighten nuts first, then give them a final snug quarter-turn with your Channellock pliers.

Transcript
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and then go back down here and hook up your drain these up put a little pipe dope on there and then put them back together clean it all up real quick the blue monster pipe thread sealant just put a little bit on the nut itself or not the nut the uh the gasket itself sorry if you're hearing a bunch of noisy guys outside mullen i if you don't know uh this is a rental and i'm trying this is a series and i'm trying to get this place rented by the first and then put your gasket on and screw back on your knot i like to just lightly snug these don't go crazy just just like that this is a thread on one side and glue on the other p-trap take your pipe thread sealant hit those joints again push it up to where it needs to be and tighten up your nuts tighten up your nuts guys just snug them up and then once i hand tighten them i just lightly tighten up the uh

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