How to Replace a Toilet Fill Valve: A Simple DIY Guide

Learn how to replace a toilet fill valve quickly and easily with our step-by-step DIY guide. Fix running toilets and save water today.

General

FigsiT Project Rating

DIY-friendly

Turn off the water at the valve behind the toilet and flush to empty the tank before you reach in.

Safety gear: Rubber gloves, Towel or sponge

Tools Required (5)

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Materials Needed (2)

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1.
Turn the water shut-off valve clockwise until it is fully closed.
2.
Flush the toilet to drain as much water from the tank as possible.
3.
Place a bucket under the water supply connection and use a wrench to disconnect the supply line from the bottom of the fill valve.
4.
Use a sponge or cup to remove any remaining water from the bottom of the tank.
5.
Unscrew the mounting nut from the fill valve shank located underneath the tank.
6.
Remove the old fill valve from inside the tank and discard it.
7.
Adjust the height of the new fill valve according to the manufacturer's instructions to fit your tank.
8.
Insert the new fill valve into the hole at the bottom of the tank and ensure the rubber gasket is seated correctly.
9.
Thread the mounting nut onto the shank from underneath the tank and tighten it firmly by hand, then give it a final quarter-turn with your wrench.
10.
Reconnect the water supply line to the new fill valve shank and tighten the connection.
11.
Turn the water shut-off valve counter-clockwise to restore water flow.
12.
Check the tank for leaks and ensure the fill valve shuts off once the water reaches the appropriate level.

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