NuFlush Universal Fill Valve Replacement with Adjustable Height for Mansfield Toilets

The float-cup fill valve is made of plastic and is a more “modern” style of anti-siphon fill valve. This type is identified by a plastic floating O-shaped cup that moves up and down around the fill valve shaft. The floating cup is attached using a metal spring clipped to a metal actuating rod. Water level in the tank is controlled by adjusting where the actuating rod connects to the float cup. This is a very popular and easy to maintain fill-valve style. This design accounts for the vast majority of toilet fill valves sold, and it is often the replacement of choice when it comes time to replace an older plunger- or diaphragm-style ballcock unit. Many styles have adjustable shafts, allowing the fill valve to be adjusted up or down to fit different toilet tank depths.