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Remove Old Angle Stop — Remove Old Compression Nut and Ferrule

Beginner

Part of project

How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 4 of 8

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In this video

Use an adjustable wrench or angle stop wrench to loosen and remove the nut behind the old compression angle stop. If possible, avoid replacing the existing nut because the ferrule (a small ring used to create a seal) underneath it can get squished around the copper pipe, making removal difficult without specialized tools like a ferrule puller or a small handsaw.

Goal: Detach the old angle stop

  • Be careful not to damage the surrounding area or pipes.
  • If necessary, use a small handsaw or ferrule puller to remove the nut.

Used in this video

  • Angle Stop Wrench (Tool Type: Adjustable wrench, Power Source: Manual, Material Compatibility: Copper, Size/Capacity: Small, Durability: High, Cost: Medium)Loosening and tightening the nut behind the angle stop.
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FAQs

What's the most critical safety step before beginning the angle stop replacement?

The most critical step is always to shut off the main water supply to your house completely, not just the valve under the sink. This prevents potential flooding and ensures no water pressure is present while you're working on the pipe.

How long should a beginner expect this project to take, and what is the approximate cost?

For a beginner, this project typically takes 1 to 2 hours, allowing time for preparation and careful leak checks. The material cost is relatively low, mainly for the new angle stop and a new supply line, usually ranging from $20 to $40.

What tools do I need beyond basic wrenches for this project?

While adjustable wrenches and pliers are essential, 150-grit sandpaper is crucial for cleaning the copper pipe to ensure a good seal. You'll also need a bucket for draining water and plenty of absorbent towels (like WYPALL L40 or Scott Rags) to manage spills.

What's a common mistake beginners make that can lead to leaks after installation?

A common mistake is not thoroughly cleaning and preparing the copper pipe surface before installing the new compression fitting. Ensure the pipe is smooth, free of burrs, and clear of old compression ring residue using 150-grit sandpaper for a watertight seal.

Remove Old Angle Stop — How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink (Step 4, Video 2) | Stesso