Preparation
Replacing a toilet flush valve is not a difficult job, but it requires some patience.
ensure to buy a flush valve that fits your toilet.
The hardware store clerk can advise you on the best flush valve for your toilet.
The Spruce / Kevin Norris
This is normally near the bottom left side of the toilet tank.
Remove the nuts threaded onto the tank bolts in the bottom of the tank.
Remove these, if possible.
The Spruce / Kevin Norris
Its fine to cut through the rubber washer and into the bolt.
If this is necessary, work with caution and wear protective gear.
Use channel-lock pliers to unscrew the mounting nut.
The Spruce / Kevin Norris
With the nut removed, pull the flush valve out of the tank.
Clean up the toilet tank before installing the new hardware.
However, most universal flush valves will work with most toilets.
The Spruce / Kevin Norris
Take care not to over-tighten the nut, as it is possible to break it.
Place the large foam gasket over the flush valve tailpiece extending through the bottom of the tank.
The goal is for the porcelain to be sandwiched by rubber washers.
The Spruce / Kevin Norris
Thread a mounting nut onto each bolt and tighten it just enough to slightly compress the rubber washers.
Thread metal washers and nuts onto the bolts and tighten them down by hand.
Standard nuts should be tightened slightly further with a wrench, but take care not to crack the porcelain.
The Spruce / Kevin Norris
check that the tank is level from side to side.
Turn on the water to the toilet.
Connect the flapper chain to the toilet handle rod from inside the tank.
The Spruce / Kevin Norris
Most importantly,check for leaksby flushing the toilet several times.
Tighten any connections that are leaking.
The labor costs should be a minimal house-call charge.
The Spruce / Kevin Norris
The Spruce / Kevin Norris
The Spruce / Kevin Norris
