Replacement Marine Scupper Flapper (Flapper Only)

Keep your boat’s scupper system performing like new with this replacement flapper valve. Please note: This listing is for the replacement flapper ONLY (trim ring, housing, and mounting hardware are not included).

Designed to block water backflow while allowing quick drainage, this flexible rubber/polymer flapper automatically opens to release water from self-bailing cockpits and bilge systems, then seals shut to prevent backpressure from forcing water back into the hull—ideal for backing down or operating in rough marine conditions.

Key Features:

• Flapper Only: Ideal for replacing worn, stiff, or damaged flappers without buying an entire new housing assembly.

• Size: Measures 2 1/4" in diameter (Outside Diameter).

• Marine-Grade Material: Built from a flexible, high-durability polymer designed to withstand harsh saltwater environments, mechanical wear, and UV exposure.

• Dependable Backflow Prevention: Top-hinged design provides a responsive seal under low backpressure, ensuring reliable protection against water ingress.