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Angle Stop Valve Types and Installation Methods

Sep 23, 2019

An angle stop, often referred to as a shut-off valve, will last many years without any problems.The angle stops usually have either a brass or chrome-plated finish. The type of intake port depends on the type of water pipe that the building uses: copper, iron pipe, CPVC, PVC or Polybutylene.

Sometimes a leak develops in the seal surrounding the valve stem. Leaks here usually only appear after opening or closing a rarely used older valve. Tightening an angle stop's packing nut, the nut surrounding the valve stem, sometimes stops the leak. However, a badly deteriorated or compromised seal will not hold water. Always hold the valve body still with one wrench while turning the packing nut clockwise with a second wrench. Before replacing an angle stop, check a local hardware store for replacement parts. Not all shut-off valves have replacement parts available. Because of internal damage to the valve body, always replace older valves that have lost the ability to close completely.

Replacing an Angle Stop

All types of angle stop water valves share a few basic replacement steps:

  1. Turn off the building's water supply.

  2. Open a hose bib, releasing the water pressure in the building's pipes.

  3. Place a bucket under the existing angle stop.

  4. If the angle stop connects to a detachable supply line, grip the existing angle stop with a wrench and place a second wrench on the 3/8-inch compression nut holding the faucet or toilet's supply tube.

  5. Hold the angle stop still and turn the 3/8-inch compression nut counterclockwise until the nut releases.

  6. Remove the supply tube. If the supply line and angle stop are a single unit, remove the supply line from the faucet or toilet.

  7. Remove the existing angle stop, using the appropriate tool.

  8. Clean the debris from the 1/2-inch water pipe's surface.

  9. Install the new angle stop, using the appropriate installation method.

  10. Hand tighten the faucet or toilet's supply tube on the angle stop's discharge port.

  11. Place one wrench on the angle stop's body and the second wrench on the 3/8-inch compression nut.

  12. Turn the 3/8-inch nut clockwise, while keeping the stop still.

  13. Turn on the building's water supply and check the valve for leaks.