To replace a toilet fill valve, follow these steps:
- Turn off the water supply to the toilet and flush to empty the tank.
- Remove the tank lid and sponge out any remaining water.
- Disconnect the water supply line from the base of the fill valve.
- Unscrew the lock nut securing the old fill valve and remove it from the tank.
- Adjust the height of the new fill valve to fit your tank, usually about 1 inch below the tank rim.
- Insert the new valve into the tank opening and thread the lock nut from underneath to secure it.
- Reconnect the water supply line to the new valve.
- Attach the refill tube to the overflow pipe inside the tank.
- Turn the water supply back on and adjust the fill valve float to set the water level to the recommended height.
- Check for leaks and proper operation.
This process typically requires basic tools like an adjustable wrench or pliers and may take about 10-15 minutes depending on experience.