Angle stops are a vital part of any plumbing system. They control the flow of water into various fixtures like toilets, faucets and appliances. Angle stops may wear out over time or become outdated. It may be necessary to change them.

It may seem daunting to change the angle stops on your plumbing system, but with the correct tools and guidance it can be an easy process. This article provides a complete guide on how to replace angle stops in a plumbing system.

Needed Tools & Materials

Before you start, you will need the following materials:

  • Adjustable wrench
  • Screwdriver
  • Pliers
  • New angle stops
  • Teflon tape
  • Pipe dope

Step 1: Shut off the water supply

It is important to turn off water to the fixture before starting any plumbing work. Turn off the shut-off valve for the fixture. If there is no shut off valve, turn the main water supply off to the house.

Step 2: Remove the old angle stops

Remove the nuts holding the angle stops. Once the nuts are removed gently pull the angle stop away from the pipe. If the angle stops are stuck on the pipes, use a sanding knife to pry them free.

Step 3: Prepare your new angle stops

Apply Teflon to the threads of the angle stops before installing them to create an airtight seal. Apply a small quantity of pipe dope onto the threads. This will prevent leaks. Follow the manufacturer’s instructions for the angle stop you are using.

Install the new angle stops

Align them with the supply lines of the water. Use an adjustable wrench on the nuts that hold in the angle stop. Do not overtighten as this could damage the angle stops.

Step 5: Connecting Water Supply

Connect the water supply to the angle stops with the appropriate fittings. Use an adjustable ratchet to tighten the fittings. Be careful not over-tighten. Once the fittings are tightened, turn the water on and check for leaks.

Step 6: Test the Angle stops

Turn on the fixture to check the temperature and water flow. If the flow of water is weak or the temperature incorrect, adjust angle stops until desired flow and temperature is achieved.


With the right tools and instructions, changing angle stops can be an easy process. These steps will help you replace old or worn out angle stops to improve the efficiency and functionality of your plumbing.

Remember to turn off your water supply before you begin. Use Teflon tape to create a waterproof seal and pipe dope to test the angle stop for temperature and flow. With a bit of effort and attention, you can change angle stops and ensure that your fixtures receive reliable water flow.