Replace an angle valve

Angle valves are the professional connection between the water supply of a building and the fittings connected to it. Like any mechanical valve, they can break as well. How to replace an angle valve, we have summarized here for you in a detailed guide.

Versatile in use - the angle valve

The angle valve is the technically correct connection between the water pipe in a building and the fittings to be connected to it. Corner valves are therefore installed wherever water is used in a household:

  • for bathroom sink
  • for bath and shower fittings
  • for the toilet flush
  • for connections in the kitchen such as mixer tap and dishwasher

Distinction cold water and hot water

Corner valves for cold and hot water are used. Which connection now leads cold water or hot water, although not further standardized. However, it has become accepted that with two adjacent lines the right one is the cold water and the left is the hot water connection.

Size of angle valves

In size, there are two versions, with the focus here on the connection to the water pipe in the wall: 3/8 inch and ½ inch. Today is ½ inch, the 3/8-inch wall connection is found only in older existing buildings. The outlet, so where the faucets are connected, is always in 3/8 inch.

Self-sealing or conventional angle valve

In the case of the angle valves, a distinction must also be made between conventional and self-sealing valves that are used. The disadvantage of self-sealing angle valves: it can happen that you have to remove and repair a corner valve. If the self-sealing valve was used, it may not now be sealed because the seal incorporated in the thread is worn out.

Step by step instructions for replacing an angle valve

  • angle valve
  • Seal material with conventional valve (hand seal, sealing paste, sealing tape)
  • possibly rubber seals for valve connection
  • possibly silicone sealant or acrylic
  • different wrenches
  • Water pump pliers or / and small pipe wrenches
  • solid rag
  • maybe buckets
  • possibly silicone syringe

1. Preparatory work

Before replacing the angle valve, you still have to turn off the main water tap, which is connected to the water pipe where you want to change the angle valve. Make sure it is turned off by turning on the mixer tap or faucet.

2. Removal of the old angle valve

First, the fittings connections are unscrewed. The angle valve is designed in the main area of ​​the body like a square, so you can grab here with a fork wrench. Alternatively, you can also use the water pump pliers or a small pipe wrench. Turn out the old angle valve.

3. Prepare the new angle valve and wall connection

Slide the rosette onto the angle valve. If the angle valve is not self-sealing, you must seal the thread with hemp, sealing paste or a sealing tape.

Clean the area around the wall connection. In modern stem walling, the area between tile mirror and water pipe is usually sealed with silicone or acrylic. Check this and renew it if necessary.

4. Install new angle valve

Now turn on the new angle valve. It should sit tight enough with three to a maximum of four turns. Only set the valve vertically - but always in the direction in which you screw in the valve. Never turn the valve back for positioning, otherwise it may leak.

5. Connection fittings and leak test

Now the valves are reconnected. You should also renew the rubber seals for this. If you do not change these, the connection could be leaking. Now turn the angle valve to and the main water tap on. Wait a while and check the angle valve connections for leaks. Then turn on the angle valve and also check the connection of the valve for leaks.

Tips & Tricks

If you want to tighten the angle valve with a water pump pliers or pipe wrenches, you need the solid cloth. This will avoid unpleasant scratches in the new chrome surface.

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