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Final Tightening with Wrench — Tighten Connections

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How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 8 of 10

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In this video

Using an adjustable wrench, grip the flat sides of the valve body to perform the final tightening. Turn the wrench clockwise an additional one-quarter to one-half turn beyond what was possible by hand. The final position of the valve outlet should be pointing in the correct direction for the supply line connection. Be careful not to apply excessive force.

Goal: Ensure a secure, leak-proof connection

  • Use a rag to protect the chrome finish from the wrench jaws.
  • Overtightening can damage the valve or the pipe fitting. Stop when the connection feels firm.

Used in this video

  • Adjustable Wrench (brand: Unknown, Tool Type: Hand Tools, Material: Metal, Size/Weight: Medium)To tighten the valve onto the pipe fitting.
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FAQs

What should I do if the old compression nut and ferrule are seized onto the copper pipe?

Apply penetrating oil, like Blaster PB Penetrating Oil, directly to the nut and ferrule. Allow it to soak for 15-30 minutes before attempting to loosen it again with your adjustable wrench. If it's still stuck, you may need to carefully cut the old ferrule off with a small hacksaw or specialized tool, taking care not to damage the copper pipe itself.

How can I prevent leaks after installing the new angle stop?

Ensure the copper pipe is clean, smooth, and free of burrs or scratches where the new ferrule will sit. Hand-tighten the compression nut first, then use your adjustable wrench to tighten it an additional half to three-quarters of a turn. Avoid overtightening, as this can damage the ferrule or pipe, but ensure it's snug enough to prevent drips.

Do I really need to shut off the main water supply for this project?

Yes, absolutely. Shutting off the main water supply is crucial to prevent significant flooding when you remove the old valve. Always relieve any remaining water pressure by opening a nearby faucet after shutting off the main supply, before starting work under the sink.

How long should this project typically take for a beginner?

For a DIY beginner, expect this project to take approximately 1 to 2 hours. This accounts for time to gather tools, carefully follow each step, and troubleshoot minor issues like a stubborn old valve or initial small leaks. Taking your time will help ensure a successful installation.

Final Tightening with Wrench — How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink (Step 8, Video 1) | Stesso