Shut Off Water Supply and Verify — Turn Off the Water Supply
Part of project
How to Fix a Leak at a Faucet Supply Line Connection · Step 2 of 9
In this video
Locate the hot and cold water shut-off valves, which are typically found in the cabinet directly beneath the sink. Turn the handles on both valves clockwise until they are fully closed. This will stop the water supply to the faucet. After shutting them off, turn the faucet handle on to drain any residual water and verify that the flow has stopped.
Goal: Prevent water flow to the faucet
- Ensure both hot and cold water lines are fully shut off before proceeding.
- Relieving the pressure by opening the faucet handle makes disassembly easier and prevents water spray.
Used in this video
- Flashlight (Flashlight Type: Handheld) · optional — Illuminating the dark cabinet under the sink
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FAQs
How long does this repair typically take for a beginner, and what's the real difficulty level?
This is a beginner-friendly project, usually taking 30-60 minutes once you have the right parts. The most challenging aspect is often working in tight, cramped spaces under the sink. Taking your time to ensure proper alignment and avoid cross-threading is key to success.
How do I know which new supply line to buy, especially regarding size and length?
Before purchasing, measure the length of your old supply line from end to end. Note the connection sizes: faucet connections are typically 1/2 inch FIP, and shutoff valve connections are commonly 3/8 inch compression. Bringing the old line to the store or taking a picture of the connections can help ensure you get an exact match.
I replaced the supply line, but it's still leaking. What should I check next?
First, ensure both ends of the new supply line are hand-tightened, then given an additional quarter to half-turn with a wrench – avoid overtightening. Check that the rubber washer (gasket) inside the supply line nuts is properly seated and undamaged. If the leak persists, the shutoff valve itself might be old and failing, or the connection point at the faucet could be compromised.
What if I can't turn off the water supply to my faucet, or the shutoff valve itself is leaking?
If the existing shutoff valve is stuck, leaking, or won't completely stop the water flow, you will need to turn off the main water supply to your entire house before proceeding. In such cases, or if you're uncomfortable with the main shutoff, it might be best to contact a qualified plumber, as replacing a main shutoff or a frozen fixture shutoff is a more advanced task.
Shut Off Water Supply and Verify — Turn Off the Water Supply
Part of project
How to Fix a Leak at a Faucet Supply Line Connection · Step 2 of 9
In this video
Locate the hot and cold water shut-off valves, which are typically found in the cabinet directly beneath the sink. Turn the handles on both valves clockwise until they are fully closed. This will stop the water supply to the faucet. After shutting them off, turn the faucet handle on to drain any residual water and verify that the flow has stopped.
Goal: Prevent water flow to the faucet
- Ensure both hot and cold water lines are fully shut off before proceeding.
- Relieving the pressure by opening the faucet handle makes disassembly easier and prevents water spray.
Used in this video
- Flashlight (Flashlight Type: Handheld) · optional — Illuminating the dark cabinet under the sink
Frequently Asked Questions
How long does this repair typically take for a beginner, and what's the real difficulty level?
This is a beginner-friendly project, usually taking 30-60 minutes once you have the right parts. The most challenging aspect is often working in tight, cramped spaces under the sink. Taking your time to ensure proper alignment and avoid cross-threading is key to success.
How do I know which new supply line to buy, especially regarding size and length?
Before purchasing, measure the length of your old supply line from end to end. Note the connection sizes: faucet connections are typically 1/2 inch FIP, and shutoff valve connections are commonly 3/8 inch compression. Bringing the old line to the store or taking a picture of the connections can help ensure you get an exact match.
I replaced the supply line, but it's still leaking. What should I check next?
First, ensure both ends of the new supply line are hand-tightened, then given an additional quarter to half-turn with a wrench – avoid overtightening. Check that the rubber washer (gasket) inside the supply line nuts is properly seated and undamaged. If the leak persists, the shutoff valve itself might be old and failing, or the connection point at the faucet could be compromised.
What if I can't turn off the water supply to my faucet, or the shutoff valve itself is leaking?
If the existing shutoff valve is stuck, leaking, or won't completely stop the water flow, you will need to turn off the main water supply to your entire house before proceeding. In such cases, or if you're uncomfortable with the main shutoff, it might be best to contact a qualified plumber, as replacing a main shutoff or a frozen fixture shutoff is a more advanced task.