How to Replace a Toilet Flapper: Easy DIY Step-by-Step Guide

Learn how to replace a toilet flapper in minutes. Follow our simple guide to fix a running toilet and stop water waste with these easy steps.

Plumbing

FigsiT Project Rating

DIY-friendly

Ensure the water is fully shut off before starting to prevent flooding the bathroom floor.

Safety gear: Rubber gloves

Tools Required (3)

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Materials Needed (1)

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1.
Locate the water shut-off valve on the wall or floor behind the toilet and turn it clockwise until it stops to shut off the water supply.
2.
Remove the toilet tank lid by lifting it straight up and setting it aside in a safe place.
3.
Flush the toilet and hold the handle down to drain as much water as possible from the tank.
4.
Use a towel or sponge to soak up any remaining water at the bottom of the tank.
5.
Disconnect the old flapper chain from the flush handle lever and remove the flapper from the pegs on the overflow tube.
6.
Take the old flapper to the hardware store to ensure you purchase the correct replacement size and type.
7.
Install the new flapper by attaching it to the overflow tube pegs and connecting the chain to the flush handle lever.
8.
Adjust the chain length so there is a small amount of slack when the flapper is closed.
9.
Turn the water supply valve counter-clockwise to refill the tank and check for leaks.
10.
Replace the tank lid once you have confirmed the toilet flushes correctly and the flapper seals properly.