How to Change a Flush Valve How to Change a Flush Valve

What You'll Need
Wrench

Every flush valve has a lifespan. Changing a flush valve doesn’t require any special tools or expertise. If your toilet constantly has running water in its bowl and you’ve tried adjusting the float in the tank, your flush valve is probably faulty.

Step 1 –  Empty the Toilet Tank

First turn off the water to avoid flooding the bathroom or getting yourself wet while changing the flush valve. Look at the wall below the toilet tank and you’ll find a valve there that you should shut off. Once you’ve shut off the water, flush all the water in the tank. Use a sponge to remove any residual water after flushing.

Step 2 – Remove the Old Flush Valve

At the bottom of the toilet tank, a nut connects the water supply pipe to the bottom of the tank. Remove this nut and the plastic retaining nut that holds the flush valve in place at the bottom of the tank. If you didn’t use a sponge to remove residual water, some water will drain out of the tank when you’ve removed this nut, so be sure to place a container to catch it. Now that you’ve loosened the old flush valve, you should be able to remove it easily, along with the float assembly.  

Step 3 – Install the New Flush Valve

Your valve will come complete with a new retaining nut and rubber gasket. Assemble the new gasket onto the threaded side of the flush valve and install the valve in the hole at the bottom of the tank. Tighten the retaining nut securely. Connect the water supply line to the threaded side of your new valve and secure it tightly.

Step 4 – Test Your Work

You’re almost done, it’s time to turn on the water and let the toilet tank fill. Adjust the float of the flush valve to the water level required in the toilet tank. The majority of toilets have a mark inside the toilet tank for you to adjust the water level to. Flush the toilet a couple of times to ensure it’s working correctly.

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