The Fluidmaster 501P21 is a replacement toilet flapper designed for reliable performance in challenging water conditions. This red rubber flapper fits toilets with 2-inch plastic or metal flush valves and is best suited for 3.5-gallon per flush toilets manufactured prior to 1994. The 501P21 eliminates the need for jiggling the toilet handle with its solid frame that delivers a consistent seal every time.
Built to last in any water condition, the 501P21 features chlorine-resistant construction that withstands harsh minerals and chemicals. It includes built-in Microban protection specially integrated into the flapper material to fight bacterial breakdown and extend product life. The removable adapter ring accommodates a wide range of flush valve styles, making installation straightforward on most toilets with 2-inch plastic or metal flush valves.
Features and Benefits
- Chlorine-Resistant Design: Built to last in any water condition, resisting degradation from harsh minerals and chemicals.
- Solid Frame Construction: Provides the best seal every time without twisting, eliminating the need for handle adjustment.
- Built-in Microban Protection: Specially integrated into the flapper material to combat bacteria and prevent flapper breakdown.
- Universal Compatibility: The removable adapter ring allows installation on flush valves with or without mounting ears.
- 5-Year Warranty: Backed by a five-year manufacturer warranty for peace of mind.
Specifications
- Brand: Fluidmaster
- Model: 501P21
- Material: Rubber
- Color: Red
- Size: 2 inches
- For: Toilets with 2-inch plastic or metal flush valves
- Best Suited For: 3.5-gallon per flush toilets made prior to 1994
- Warranty: 5 years
WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov








