Connect water supply — Disconnect Faucet Supply Line
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 2 of 10
In this video
Connect the faucet's pre-connected supply lines to the water supply shut-off valves (hot on the left, cold on the right). Hand-tighten first, then use a wrench to finish tightening. If using flexible PEX lines, use pliers or another wrench to hold the water shut-off valve steady while tightening.
Goal: Connect faucet to water supply
- Hot water supply line typically goes to the left connection point.
- Use pliers or another wrench to stabilize the shut-off valves if they are flexible PEX lines.
- It's common for shut-off valves to leak a bit at the packing nut when turned on and off. If this happens, just tighten the packing nut behind the handle about 1/8th of a turn.
Used in this video
- Wrench · optional — Tightening supply lines
- Pliers · optional — Holding shut-off valve
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FAQs
Is the 3-hour time estimate realistic for a beginner attempting this for the first time?
For a beginner, the 3-hour estimate is achievable, but it's wise to budget an extra hour or two, especially if you encounter corroded parts or need to double-check steps. Taking your time to ensure proper installation is key to preventing future leaks and avoiding costly mistakes.
What are the most common mistakes beginners make when replacing an angle stop, and how can I avoid them?
Overtightening the compression nut is a frequent error that can damage the pipe or ferrule, leading to leaks. Always use two wrenches—one to hold the valve body and one to tighten the nut—and tighten until snug, then an additional quarter to half turn. Not fully cleaning the pipe stub-out is another mistake; ensure it's smooth and free of debris for a good seal.
Do I really need all the specific tools listed, or can I make do with a basic adjustable wrench and pliers?
While an adjustable wrench and tongue-and-groove pliers are essential, specialized tools like the Angle Compression Stop Wrench can make working in tight spaces much easier and prevent stripped nuts. For a beginner, having the right tools improves efficiency and reduces the likelihood of issues. Consider borrowing or renting specialized tools if you don't want to purchase them for a one-time use.
What are the crucial safety precautions to take before starting this project, particularly regarding water shut-off?
The most critical step is completely shutting off the main water supply to your house. Verify this by opening a lower-level faucet after shutting off the main to ensure the water flow stops completely. Also, ensure you have plenty of towels and a bucket ready to catch any residual water from the pipes to prevent water damage under the sink.
Connect water supply — Disconnect Faucet Supply Line
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 2 of 10
In this video
Connect the faucet's pre-connected supply lines to the water supply shut-off valves (hot on the left, cold on the right). Hand-tighten first, then use a wrench to finish tightening. If using flexible PEX lines, use pliers or another wrench to hold the water shut-off valve steady while tightening.
Goal: Connect faucet to water supply
- Hot water supply line typically goes to the left connection point.
- Use pliers or another wrench to stabilize the shut-off valves if they are flexible PEX lines.
- It's common for shut-off valves to leak a bit at the packing nut when turned on and off. If this happens, just tighten the packing nut behind the handle about 1/8th of a turn.
Used in this video
- Wrench · optional — Tightening supply lines
- Pliers · optional — Holding shut-off valve
Frequently Asked Questions
Is the 3-hour time estimate realistic for a beginner attempting this for the first time?
For a beginner, the 3-hour estimate is achievable, but it's wise to budget an extra hour or two, especially if you encounter corroded parts or need to double-check steps. Taking your time to ensure proper installation is key to preventing future leaks and avoiding costly mistakes.
What are the most common mistakes beginners make when replacing an angle stop, and how can I avoid them?
Overtightening the compression nut is a frequent error that can damage the pipe or ferrule, leading to leaks. Always use two wrenches—one to hold the valve body and one to tighten the nut—and tighten until snug, then an additional quarter to half turn. Not fully cleaning the pipe stub-out is another mistake; ensure it's smooth and free of debris for a good seal.
Do I really need all the specific tools listed, or can I make do with a basic adjustable wrench and pliers?
While an adjustable wrench and tongue-and-groove pliers are essential, specialized tools like the Angle Compression Stop Wrench can make working in tight spaces much easier and prevent stripped nuts. For a beginner, having the right tools improves efficiency and reduces the likelihood of issues. Consider borrowing or renting specialized tools if you don't want to purchase them for a one-time use.
What are the crucial safety precautions to take before starting this project, particularly regarding water shut-off?
The most critical step is completely shutting off the main water supply to your house. Verify this by opening a lower-level faucet after shutting off the main to ensure the water flow stops completely. Also, ensure you have plenty of towels and a bucket ready to catch any residual water from the pipes to prevent water damage under the sink.