Tools & materials
- Universal fill valve kit
- Flapper sized to your flush valve
- Adjustable wrench
- Sponge and bucket
- Towel
Step by step
- Step 1
Turn off the supply valve, flush and sponge out the remaining water in the tank.
- Step 2
Place a towel down, then unscrew the supply line from the bottom of the tank.
- Step 3
Unscrew the locknut under the tank and lift out the old fill valve.
- Step 4
Set the new valve's height to the tank (the critical line should sit 1 inch above the overflow tube), insert it and hand-tighten the locknut plus a quarter turn.
- Step 5
Clip the refill tube to the overflow tube and replace the flapper while the tank is empty.
- Step 6
Reconnect the supply line, turn the water on and adjust the float so water stops about 1 inch below the overflow.
When to stop and call ProFix
If you see any of these, stop and call us:
- The supply valve or line is corroded or won't shut off
- The tank leaks at the bolts after the repair
- The flush valve seat is cracked or rough
- You have a pressure-assist or dual-flush tank you're not familiar with
Not in the mood to DIY? A ProFix pro can handle it for you in Chicago Metro and Dallas–Fort Worth, with a written price before work starts.
Related guides
These guides are general information for simple repairs. You're responsible for your own safety and for following local codes and your lease or HOA rules. When in doubt, stop and call a licensed professional. All DIY guides