How to Install a Flushometer Bathroom Toilet

Flushometer bathroom toilets differ from conventional bathroom toilets for of a number of reasons, but the main one is that it saves water. Also called a pressure-valve-flush toilet, it regulates water pressure and duration of flush by using a valve and a control stop. A flushometer bathroom toilet will come with one of two types of valves- piston or diaphragm. For areas with hard water, the piston valve is the better of the two.

When installing a flushometer bathroom toilet it is important to first turn off the water supply. Next, flush the toilet to get any remaining water out of the tank. Remove the lid, loosen the setscrew and remove the stopper assembly. Use an adjustable wrench to unscrew the nut beneath the tank at the water inlet pipe while at the same time holding the hex net inside the tank with locking pliers. This will disconnect the water supply line.

If the tank is mounted on the bowl, remove the tank’s bolts with an open-end wrench and a screwdriver. Lift the tank carefully off the bowl and lay flat on its back on an old towel to prevent it from getting scratched. If the tank is mounted on a wall, use a large pipe wrench to remove the slip nuts at both ends of the 90 degree pipe between the tank and the bowl.

Next, unscrew the locknut from the valve-seat shaft and pull the valve-seat into the tank. Replace with the new valve-seat assembly ensuring that all the parts are in the correct order. Reattach the tank to the bowl and reconnect the water supply line. Finally, replace the stopper assembly and turn on the water supply.

To regulate the amount of water used for flushing in a flushometer bathroom toilet, you can adjust a screw in the control stop. If the screw is not clearly visible, check under any decorative cover it may have. Turning the screw clockwise will decrease the water flow while turning it counterclockwise will increase it.

To replace a diaphragm valve on a flushometer bathroom toilet, start by turning off the water supply as mentioned previously, and then unscrew the valve’s outer cover using a taped pipe wrench. Remove the inner cover and then remove the diapragm assembly. Replace the worn parts inside the guide as well as the diapragm and valve seat. When you have finished replacing the necessary parts, reassemble and reconnect the water supply.

For piston valve replacement, turn off the water supply and unscrew the nut of the outer cover to take the cover off. Next, unscrew the inner cover and then pull outthe piston assembly. To replace the cup, remove the screws that join the cup and the piston and replace worn parts. Reassemble and reconnect the water supply.