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Clean the Drain Hose — Clean the P-Trap and Inspect Washers

Beginner90 mins

Part of project

How to Clean Out and Unclog a Bathroom Sink P-Trap · Step 4 of 6

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In this video

Take the removed drain hose to a bathtub, shower, or an outdoor area with a water source. Thoroughly flush the hose with warm water and detergent to remove any built-up sludge, mold, and debris. For stubborn blockages, a flexible cleaning snake can be fed through the hose to dislodge the grime. The goal is to clean it until water runs clear and the bad smell is gone.

Goal: Remove build-up and odors from the hose

  • Using a high-pressure water source, like a shower head or garden hose, can be very effective for flushing out debris.

Used in this video

  • Cleaning Snake (Tool Type: Specialized appliance tools) · optionalDislodging stubborn blockages and grime from inside the hose.
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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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So once you've got your hose free you're going to need some space to clean it out Now if you've got a bar, you could do this in the bar, you could do it in the shower You could even do it outside with the hose If you can run some water through it get a bit of pressure and water running through it That might help to clear it out with this bath We can actually attach it pretty much to the bath tap here But find a way just to get something washing through it Be really careful with this because it is an integral part of your washing machine So you don't want to do anything that is going to damage it in any way You could try if you think there's a blockage or you need a bit more access to it You could try one of these which is like a cleaning snake So you can always try feeding that right down it and giving that a good clean as well Other than that I would just use detergent and warm water When we first took this out it was pretty gross what came out of it There was lots of black water in the bath, it's not really bad It's now much better but we could actually still do a bit more cleaning on it

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