Skip to main content

Disconnect Drain and Supply Lines — Prepare the Workspace

Beginner90 mins

Part of project

How to Clean Out a Bathroom Sink P-Trap · Step 1 of 6

Helpful?

In this video

Place a bucket directly under the P-trap to catch any trapped water. Use channel-lock pliers to loosen the two large slip nuts that connect the curved P-trap to the sink's drain tailpiece and the drain pipe in the wall. Once loose, you can finish unscrewing them by hand and remove the P-trap, emptying any water into the bucket. Next, unscrew the connectors for the hot and cold water supply lines from the shutoff valves, allowing them to drain into the bucket as well.

Goal: Disconnect all plumbing from the wall

Used in this video

  • Channel-lock pliers (Tool Type: Pliers, Pliers_Type: Channel-Lock, Power Source: Manual)Loosening the slip nuts on the P-trap.
  • Bucket (Bucket Size: 5 gallon)Catching residual water from the drain and supply lines.
32.1K views26715 minutes
The Plumbers Plunger

201K subscribers

View Channel

FAQs

What essential safety gear should I use when cleaning a bathroom sink P-trap?

Always wear safety gloves and eye protection to shield yourself from dirty water, potential splashes of grime, and any old cleaning agents that might still be present. This project can be messy, so protecting your hands and eyes is crucial for hygiene and safety.

How long does this P-trap cleaning project typically take for a beginner, and what's the approximate cost?

This project is rated for beginners and typically takes about 90 minutes. The cost is minimal if you already own basic tools like pliers and a bucket; you might only need to purchase new slip nuts and washers if the old ones are worn, which are inexpensive.

Do I need specialized plumbing tools for this, or can I use basic household items?

While basic items like a bucket and towels are essential, you will need specific tools such as Channellock Tongue and Groove Pliers to loosen the slip nuts effectively. A flexible bottle brush is also highly recommended for thoroughly cleaning out debris inside the P-trap.

What are common mistakes to avoid during reassembly to prevent leaks after cleaning the P-trap?

The most common mistakes are misaligning the flanged washers or overtightening/undertightening the slip nuts. Ensure the washers are correctly seated, hand-tighten the slip nuts first, then use pliers for a final snug turn without stripping the threads. Always run water and test for leaks immediately afterward.

Disconnect Drain and Supply Lines — How to Clean Out a Bathroom Sink P-Trap (Step 1, Video 3) | Stesso