What is a toilet fill valve? (with photos)

A toilet fill valve controls the water that flows into the toilet tank.

A toilet fill valve is located in the tank part of a toilet and controls the flow of water into the tank. Connected to the float mechanism, the toilet fill valve is activated when the float starts to fall into the tank. When the water reaches the predetermined maximum level, the toilet fill valve closes and stops the flow of water to the toilet tank.

The fill valve is located on the toilet tank directly above the inlet water line.

Made of plastic, the toilet fill valve is not subject to corrosion or rust; however, scale, as well as mineral buildup from hard water, can occasionally render the valve inoperable. Most toilet bowl cleaning chemicals can prevent this buildup and keep your toilet fill valve in working condition for years. Proper float adjustment is critical to the long life of the toilet fill valve, as most broken fill valves are due to floats that work incorrectly.

Some people may prefer to adjust their toilets to a lower water level to save money.

The fill valve is located on the toilet tank directly above the inlet water line. To replace the fill valve, the water must first be turned off in the water line. With the water off, you can flush and drain the bathroom water supply. This will provide ample dry space to remove the toilet fill valve and replace it with another valve. It is a wise decision for users to replace the float and pawl mechanism at the same time to avoid having to drain the system again at a later date.

See also  What is a sanitary t-shirt? (with photo)

Once the fill valve is replaced, the water can be turned on again. The float must be set to turn off the water when it reaches the maximum level. Typically, the float can be adjusted by bending the metal rod that connects it to the fill valve. To turn off the water flow, the float ball must be bent towards the water. This will cause the fill valve to close earlier; conversely, bending the stem upwards will allow the water to flow longer before triggering the fill valve and stopping the flow.

A properly functioning toilet fill valve will be silent when the tank reaches the maximum water level. Any noise or sound coming from the tank is an indication that water continues to flow out of the fill valve. Normally, a small adjustment to the floating arm will correct this problem. Other reasons the fill valve may continue to allow water to flow into the tank are stuck check valves or an incorrectly adjusted discharge arm current. To resolve this issue, users must ensure that the current is allowing the check valve to close completely.

Leave a Comment