After removing the valve, the old compression nut and the small brass ring, called a ferrule, will remain on the pipe. Both must be removed. Slide the old nut off. The ferrule is often compressed tightly onto the pipe. The best tool for this is a dedicated ferrule puller, which safely pulls it off without damaging the pipe. If you don't have one, you can very carefully cut a slot into the ferrule with a mini hacksaw (being careful not to cut into the copper pipe itself) and then pry it open with a flathead screwdriver. Once the ferrule is off, use a piece of emery cloth or fine-grit sandpaper to thoroughly clean the end of the copper pipe. Remove all mineral deposits, old putty, and oxidation until the copper is shiny and smooth. This ensures the new ferrule will create a perfect, watertight seal.
You're viewing a step from: How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink
This project involves replacing a leaking shutoff valve (angle stop) under a sink. The process includes shutting off the main water supply, removing the old valve from the copper pipe stub-out, cleaning the pipe, installing a new compression-style angle stop, and reconnecting the faucet supply line, followed by a thorough leak test.
Frequently Asked Questions
How long should I expect this project to take for a beginner, and what's the overall difficulty level?
This is a beginner-friendly plumbing project, typically taking 30-60 minutes once you have all the tools and materials ready. The most crucial steps involve ensuring the water supply is off and achieving a watertight seal.
What's the most crucial safety step I need to take before starting to avoid major water damage?
The most crucial step is to fully shut off the main water supply to your home before you begin any work. After turning it off, open a faucet on a lower level to confirm water flow has completely stopped and to drain the lines.
Do I really need a specific type of adjustable wrench, or will any adjustable wrench work for this project?
While the 12-inch adjustable wrench listed provides good leverage, any sturdy adjustable wrench that can securely grip the compression nuts will work. Ensure it's in good condition to prevent slipping and damage.
What is the most common mistake beginners make when installing a new compression angle stop, and how can I avoid it?
The most common mistake is overtightening or undertightening the compression nut, leading to leaks or damaging the valve/pipe. Tighten the nut until it feels snug, then give it an additional quarter to half turn, being careful not to strip threads.
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink
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Step 1: Shut Off Main Water Supply and Drain Lines
Step 1: Shut Off Main Water Supply and Drain Lines
Step 1: Shut Off Main Water Supply and Drain Lines
Step 2: Disconnect Faucet Supply Line
Step 2: Disconnect Faucet Supply Line
Step 2: Disconnect Faucet Supply Line
Step 3: Remove the Old Angle Stop
Step 3: Remove the Old Angle Stop
Step 3: Remove the Old Angle Stop
Step 4: Remove Old Ferrule and Clean Pipe
Step 4: Remove Old Ferrule and Clean Pipe
Step 4: Remove Old Ferrule and Clean Pipe
Step 5: Install the New Angle Stop
Step 5: Install the New Angle Stop
Step 5: Install the New Angle Stop
Step 6: Reconnect Supply Line and Test for Leaks
Step 6: Reconnect Supply Line and Test for Leaks
Step 6: Reconnect Supply Line and Test for Leaks
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