Connect water supply — Disconnect the Faucet Supply Line
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 2 of 8
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
17K subscribers
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.
Connect water supply — Disconnect the Faucet Supply Line
Part of project
How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 2 of 8
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
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.