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Test for Leaks — Tighten and Test for Leaks

Beginner90 mins

Part of project

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

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In this video

Once everything is reassembled, turn on the shower faucet to test your work. Check all connection points for any signs of dripping or leaking. If you notice a leak from a compression fitting or the knurled shower head nut, use the appropriate tool (adjustable wrench or channel-lock pliers with a rag) to tighten the connection an additional quarter turn. This should be sufficient to stop the leak without over-tightening.

Goal: Stop the leak completely

Used in this video

  • Adjustable wrench (Wrench Type: Adjustable wrench) · optionalMaking a final quarter-turn tightening adjustment on compression nuts.
  • Channel-lock pliers (Pliers Type: Slip-joint pliers) · optionalMaking a final quarter-turn tightening on the knurled shower head nut.
  • Rag (Material: Fabric scraps) · optionalProtecting the finish during final tightening.
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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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Step nine. You can now test whether there's any leak by turning on the shower faucet. In case of a leak and the shower head features compression fittings, then use an adjustable wrench to tighten the compression nut a quarter turn. In case the leakage is coming from the node shower head nut, you'll need to take a piece of rag and wrap it around the leaking nut. Use a channel lock pliers to tighten the shower head nut a quarter turn.

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