Remove Old Pressure Reducing Valve — Remove the Old Angle Stop
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 3 of 7
In this video
Position a bucket directly underneath the pressure reducing valve to catch any residual water. Using large wrenches, such as a pipe wrench or adjustable wrenches, loosen the union nuts connecting the valve to the pipes. Once the unions are loose, continue to use the wrenches to fully unthread and remove the old valve from the plumbing line. Be sure to hold the existing pipe fittings steady with a second wrench to prevent twisting or damaging the pipes.
Goal: Remove the faulty PRV
- Be prepared for water to drain from the pipes once the unions are loosened.
- Use a second wrench to counter-torque and prevent damage to the existing pipes and fittings.
Used in this video
- Pipe Wrench (Wrench Type: Adjustable Crescent) — Gripping and turning the PRV and union nuts.
- Adjustable Wrench (Wrench Type: Adjustable Crescent) — Loosening and tightening nuts and fittings.
- Bucket (Bucket Size: 5 gallon) — Catching water that drains from the pipes.
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FAQs
What's the absolute first thing I should do to ensure safety and prevent water damage before starting?
The most critical first step is to shut off the main water supply to your house. After that, open the nearest faucet (or the faucet above the angle stop you're replacing) to drain any residual water from the lines and relieve pressure, minimizing spills during the replacement.
Is this project genuinely suitable for a beginner, and is the 3-hour estimate realistic for someone new to plumbing?
Yes, this project is considered beginner-friendly as it doesn't require advanced plumbing skills like soldering. The 3-hour estimate is realistic, accounting for preparation, potential challenges like corroded parts, careful installation, and thorough leak checking, which is crucial for a successful outcome.
Do I really need all the specialized wrenches and pliers listed, or can I manage with basic tools?
While an adjustable wrench is essential, the Channellock pliers (like the 12 in. V-Jaw Tongue and Groove) are highly recommended. They provide superior grip, especially on older, potentially rounded or stuck nuts, preventing frustration and potential damage. A good flashlight is also invaluable for seeing into tight, dark spaces under a sink.
What's the most common mistake beginners make that leads to leaks after installing the new angle stop?
The most common mistake is improper installation of the compression fitting. Ensure the pipe stub-out is clean and smooth, and the compression nut is tightened correctly. Tighten it firmly by hand, then use a wrench for another 1/2 to 3/4 turn – overtightening can crush the ferrule, while undertightening will leak.
Remove Old Pressure Reducing Valve — Remove the Old Angle Stop
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 3 of 7
In this video
Position a bucket directly underneath the pressure reducing valve to catch any residual water. Using large wrenches, such as a pipe wrench or adjustable wrenches, loosen the union nuts connecting the valve to the pipes. Once the unions are loose, continue to use the wrenches to fully unthread and remove the old valve from the plumbing line. Be sure to hold the existing pipe fittings steady with a second wrench to prevent twisting or damaging the pipes.
Goal: Remove the faulty PRV
- Be prepared for water to drain from the pipes once the unions are loosened.
- Use a second wrench to counter-torque and prevent damage to the existing pipes and fittings.
Used in this video
- Pipe Wrench (Wrench Type: Adjustable Crescent) — Gripping and turning the PRV and union nuts.
- Adjustable Wrench (Wrench Type: Adjustable Crescent) — Loosening and tightening nuts and fittings.
- Bucket (Bucket Size: 5 gallon) — Catching water that drains from the pipes.
Frequently Asked Questions
What's the absolute first thing I should do to ensure safety and prevent water damage before starting?
The most critical first step is to shut off the main water supply to your house. After that, open the nearest faucet (or the faucet above the angle stop you're replacing) to drain any residual water from the lines and relieve pressure, minimizing spills during the replacement.
Is this project genuinely suitable for a beginner, and is the 3-hour estimate realistic for someone new to plumbing?
Yes, this project is considered beginner-friendly as it doesn't require advanced plumbing skills like soldering. The 3-hour estimate is realistic, accounting for preparation, potential challenges like corroded parts, careful installation, and thorough leak checking, which is crucial for a successful outcome.
Do I really need all the specialized wrenches and pliers listed, or can I manage with basic tools?
While an adjustable wrench is essential, the Channellock pliers (like the 12 in. V-Jaw Tongue and Groove) are highly recommended. They provide superior grip, especially on older, potentially rounded or stuck nuts, preventing frustration and potential damage. A good flashlight is also invaluable for seeing into tight, dark spaces under a sink.
What's the most common mistake beginners make that leads to leaks after installing the new angle stop?
The most common mistake is improper installation of the compression fitting. Ensure the pipe stub-out is clean and smooth, and the compression nut is tightened correctly. Tighten it firmly by hand, then use a wrench for another 1/2 to 3/4 turn – overtightening can crush the ferrule, while undertightening will leak.