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Step 7 · Tighten the Compression Fitting

Slide the compression nut up to the threads on the valve body and hand-tighten it as much as you can. Now, use your two wrenches again. Use one wrench as a backup to hold the valve body steady, preventing it from turning. Use the other wrench to tighten the compression nut an additional one-half to three-quarters of a turn. The goal is to compress the ferrule onto the pipe to create a seal, but not to overtighten it. Do not use plumber's tape or pipe dope on compression fittings.

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Step 7 · Tighten the Compression Fitting

Slide the compression nut up to the threads on the valve body and hand-tighten it as much as you can. Now, use your two wrenches again. Use one wrench as a backup to hold the valve body steady, preventing it from turning. Use the other wrench to tighten the compression nut an additional one-half to three-quarters of a turn. The goal is to compress the ferrule onto the pipe to create a seal, but not to overtighten it. Do not use plumber's tape or pipe dope on compression fittings.

Tools and Materials

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How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink

Step 7 of 10·25 min left

Shut Off Main Water and Drain Pipes
15 mins2 itemsIntermediate
Disconnect Faucet Supply Line
5 mins4 itemsIntermediate
Remove the Old Angle Stop
15 mins4 itemsAdvanced
Remove Old Nut and Ferrule
15 mins2 items
Clean and Prepare Pipe Stub-Out
5 mins3 itemsBeginner
Install the New Angle Stop
5 mins1 itemsIntermediate
7
Tighten the Compression Fitting
5 mins2 itemsAdvanced
8
Reconnect the Supply Line
5 mins2 itemsBeginner
9
Restore Water and Check for Leaks
10 mins1 itemsIntermediate
10
Final Test and Cleanup
5 mins2 itemsBeginner
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