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Test for leaks. — Reconnect the Water Supply Lines

Beginner2 hours

Part of project

Fix a Leaky Faucet: Repairing Water Intake Leaks · Step 5 of 5

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Turn the water supply back on slowly and check for leaks. If leaking persists, tighten the nut further or reapply plumber's tape.

Goal: Check for leaks and adjust

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This Old House

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FAQs

How difficult is this water intake leak repair for a DIY beginner, and can it realistically be done in 2 hours?

This project is indeed suitable for beginners, focusing on straightforward disconnection and reconnection of supply lines. The 2-hour estimate is realistic, assuming you have the necessary tools readily available and don't encounter heavily seized or corroded connections. Taking your time to ensure proper sealing is key.

What should I do if the shut-off valves under my sink don't work or are stuck, preventing me from turning off the water?

If the local shut-off valves are faulty or seized, you'll need to turn off the main water supply to your entire home. Locate your home's main water shut-off valve, usually in the basement, garage, or utility closet, and turn it clockwise until the water flow stops completely. Remember to notify anyone in your household before doing this.

Is Teflon tape absolutely necessary when reconnecting the water supply lines to the faucet tailpieces, and how should it be applied?

Yes, Teflon tape (also known as PTFE tape or plumber's tape) is highly recommended for these threaded connections. It acts as a lubricant to help threads seal better and prevents leaks. Wrap the tape clockwise around the threads of the faucet tailpiece 2-3 times, ensuring it's snug and doesn't cover the opening.

I reconnected the supply lines, but the faucet is still leaking where they attach. What's the most common reason for this, and how can I fix it?

The most common reasons for a persistent leak are improperly applied Teflon tape or loose connections. First, ensure the Teflon tape was wrapped clockwise and isn't bunched up. Then, gently tighten the supply line nuts a bit more with your adjustable wrench, being careful not to overtighten and strip the threads.

Transcript
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but still allow the valve to turn smoothly. Turn the water supply back on by opening the main valve. Slowly open the valve by turning the handle counterclockwise. Check for any leaks around the packing nut or stem. If you notice any leaking, tighten the packing nut slightly until the leak stops. The process will also help flush the supply line. With the repair complete, monitor the valve for a few days to ensure the leak is fully resolved.

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