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Shut Off Water Supply and Verify — Shut Off Main Water Supply

Beginner3 hours

Part of project

How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink · Step 1 of 8

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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) · optionalIlluminating the dark cabinet under the sink
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FAQs

This project is listed as 'beginner' difficulty, but involves water shut-off. Is it truly manageable for someone with no plumbing experience?

Yes, this project is very manageable for beginners provided you follow the steps carefully and patiently. The key is to ensure the main water supply is completely off before starting. Take your time, read all instructions before beginning, and don't hesitate to consult online videos if a step feels unclear.

What should I do if I can't locate or shut off my home's main water supply valve?

Locating and properly operating your main water shut-off valve is critical before starting. If you can't find it or it's stuck, do not force it. In such cases, it's best to contact a qualified plumber to assist with the shut-off or perform the repair to avoid potential major water damage.

The guide mentions installing a 'quarter-turn ball valve.' Why is this type recommended over a traditional multi-turn compression valve?

Quarter-turn ball valves are highly recommended because they offer superior durability and reliability. They are less prone to leaks over time and operate with a simple 90-degree turn, making them much easier to use and less likely to seize up than older multi-turn compression valves, especially in an emergency.

After installing the new angle stop and turning the water back on, what are the most common reasons it might still leak, and how do I fix them?

Common leaks usually stem from improper compression of the ferrule, a damaged ferrule, or a connection that isn't tight enough. Ensure the compression nut is snugly tightened (but not overtightened) and that the ferrule is correctly seated. If using a new supply line, confirm the washers are properly installed and the connection is secure.

Shut Off Water Supply and Verify — How to Replace a Leaky Angle Stop (Shutoff Valve) Under Your Sink (Step 1, Video 3) | Stesso