Project Guide

How To Install a Ballcock Fill Valve

Shut Off the Water and Flush the Toilet
Shut water flush toilet - Install Ballcock Fill Valve

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
Place align new valve - Install Ballcock Fill 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
Attach refill tube - Install Ballcock Fill Valve

Bend or clip the refill tube so that the tip is inside the overflow pipe.

Attach Supply Line and Turn On Water
Attach supply line  - Install Ballcock Fill Valve
  • 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
Adjust water level tank - Install Ballcock Fill Valve

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.