Fluidmaster 503 Universal Toilet Flapper 2 Inches

Product Description

The FLUIDMASTER 503 is a universal toilet flapper designed to seal the flush valve opening in residential toilet tanks. The flexible frame design allows the flapper to conform to a range of flush valve seat profiles, creating a reliable watertight seal. At 2 inches, it fits the most common residential flush valve size. Plumbers and experienced DIYers install this flapper as a direct repair component when a toilet runs continuously, fills slowly, or fails to flush completely due to a worn or deteriorated original flapper.

The 503 is intended for residential toilet repair applications. Its flexible frame construction makes it compatible with a wide variety of toilet tank configurations where a standard 2-inch flapper is required. It is a single-piece replacement unit suited for routine maintenance and service calls where a quick, reliable flapper swap is needed to restore proper toilet operation.

Key Features

• 2-inch seat diameter fits the most common residential flush valve size
• Flexible frame design conforms to varied flush valve seat profiles for a secure seal
• Universal fit reduces the need to stock multiple flapper SKUs
• Single-piece construction for straightforward installation
• Black rubber material resists chlorine and standard municipal water treatment chemicals

Compatibility

Designed as an OEM-style replacement flapper for residential toilets with a standard 2-inch flush valve seat.

Installation Notes

Installation is a standard plumbing repair task performed by licensed plumbers or knowledgeable DIYers. Shut off the water supply valve at the base of the toilet and flush to empty the tank before beginning work. Disconnect the old flapper from the overflow tube ears and the lift chain, then seat the new flapper and reconnect the chain with appropriate slack. Restore water supply and verify the flapper seals fully after each flush with no continuous running.

Technical Specifications

• Flapper Seat Size: 2 inches
• Frame Type: Flexible
• Color: Black
• Quantity: 1 piece

Standard Information

• Brand: FLUIDMASTER
• Manufacturer Part Number: 503