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Install New Nut and Compression Ring — Install the New Angle Stop

Beginner3 hours

Part of project

How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 7 of 9

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In this video

Take the new compression nut from the new angle stop package and slide it onto the cleaned copper pipe, ensuring the threads face outward. Following the nut, slide the new brass compression ring onto the pipe. Gently push it on until it is seated snugly against the end of the pipe.

Goal: Position new fittings

  • Make sure the compression ring is oriented correctly, with the tapered end facing towards the valve.
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FAQs

What's the single most important safety step to take before I even touch the leaky angle stop?

The most critical step is to shut off the main water supply to your home. This prevents potential flooding and ensures a safe working environment. Always confirm the water is off by testing a nearby faucet before proceeding with any work.

The project is listed as 'beginner' difficulty, but 3 hours seems long for a valve. Is it really that involved?

While replacing an angle stop is beginner-friendly, the 3-hour estimate accounts for prep work like gathering tools, draining lines, dealing with potential seized parts, and thorough leak testing. Taking your time ensures a proper, leak-free installation, so don't rush the process.

I see "Adjustable Wrench" and "Tongue and Groove Pliers" listed. Are these specific tools essential, or can I get by with a generic wrench set?

Yes, these specific tools are highly recommended. An adjustable wrench helps securely tighten the compression nut on the new valve without stripping it, while tongue and groove pliers (like Channellock) provide a strong grip for holding the valve or pipe steady. Using the correct tools prevents damage and ensures a tight, leak-free connection.

This project specifically mentions installing a "compression-style valve." Are there other types of angle stops, and why is this type recommended for a DIYer?

Yes, other types include soldered (sweat) and push-to-connect (SharkBite) valves. Compression-style valves are ideal for DIYers because they create a watertight seal by compressing a ferrule onto the pipe, requiring only basic hand tools and no specialized skills like soldering, making them relatively easy to install.

Transcript
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Go ahead and discard the old nut that tightened down your old angle stop. Once you finish, go ahead and put on your new nut and then put on your compression ring and just be real gentle. You may have to work it in there but it will go inside nice and smooth and now you're ready to install your new angle stop.

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