Remove the Old Valve Under Pressure — Remove the Old Angle Stop
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 3 of 8
In this video
Use two large wrenches for this critical step. Place one wrench (a pipe wrench) on the galvanized pipe to hold it firmly in place and prevent it from twisting. Place the second wrench (an adjustable wrench) on the body of the old valve. Carefully and steadily apply force in a counter-clockwise direction to the valve wrench. Once it breaks loose, open the valve handle fully to relieve some pressure, then continue unscrewing by hand. Be prepared for a high-pressure stream of water once the valve is fully removed.
Goal: Unscrew the leaking valve from the pipe
- It is crucial to brace the galvanized pipe to prevent it from breaking. Failure to do so could lead to a major, uncontrolled leak.
- Water will spray out with significant force. Be prepared to get completely wet.
Used in this video
- Pipe Wrench (Wrench Type: Pipe wrench) — To hold the galvanized pipe steady and prevent it from breaking.
- Adjustable Wrench (Wrench Type: Adjustable crescent) — To grip and turn the body of the old valve for removal.
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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 the Old Valve Under Pressure — Remove the Old Angle Stop
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 3 of 8
In this video
Use two large wrenches for this critical step. Place one wrench (a pipe wrench) on the galvanized pipe to hold it firmly in place and prevent it from twisting. Place the second wrench (an adjustable wrench) on the body of the old valve. Carefully and steadily apply force in a counter-clockwise direction to the valve wrench. Once it breaks loose, open the valve handle fully to relieve some pressure, then continue unscrewing by hand. Be prepared for a high-pressure stream of water once the valve is fully removed.
Goal: Unscrew the leaking valve from the pipe
- It is crucial to brace the galvanized pipe to prevent it from breaking. Failure to do so could lead to a major, uncontrolled leak.
- Water will spray out with significant force. Be prepared to get completely wet.
Used in this video
- Pipe Wrench (Wrench Type: Pipe wrench) — To hold the galvanized pipe steady and prevent it from breaking.
- Adjustable Wrench (Wrench Type: Adjustable crescent) — To grip and turn the body of the old valve for removal.
Frequently Asked Questions
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.