Under 2 hours
Many older toilets have ballcock fill valves that will eventually need replacing due to use and wear. If your toilet runs constantly, makes odd humming or groaning sounds or the handle feels light when you press down on it and the toilet won’t flush, you may need to replace your toilet’s ballcock assembly valve. The video above and the guide below will give you step-by-step instructions on how to replace a toilet ballcock fill valve.
Shut Off the Water and Flush the Toilet
Once you've flushed the toilet and emptied the tank, go underneath the tank and place a bucket under the retaining nut. Now remove the ballcock retaining nut with an adjustable wrench and take out the old ballcock assembly.
Align the New Ballcock Valve
- Attach a new cone washer to the new ballcock tailpiece and insert the tailpiece into the tank opening
- Align the float arm socket in float arm will pass behind the overflow pipe.
- Screw the float ball onto the float arm.
Attach Refill Tube
Bend or clip the refill tube so that the tip is inside the overflow pipe.
Attach Supply Line and Turn On Water
- Screw the mounting nut and the supply-line coupling nut onto the ballcock tailpiece and tighten it with an adjustable wrench.
- Turn on the water and check for leaks.
TIP: Do not over-tighten the mounting nut. It can crack the toilet tank.
Adjust the Water Level in the Tank
The water level in the tank should be about 1/2 inch below the top of the overflow pipe, or align with the marked "full" line inside the tank.
You can replace a ballcock fill valve without calling a professional toilet repair service for help. Ready to tackle your project? Use The Home Depot Mobile App to locate products and check inventory.