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Replacement kit for flapper scuppers with thermoplastic elastomer flappers and fasteners

T-H Marine Supplies

T-H Marine Supplies Flapper Scupper Replacement Kit

SKU CH-S7TJ-Y1CRY

Replaces worn scupper flappers with UV-resistant thermoplastic elastomer parts that resist curling, kit includes two sizes plus keepers and fasteners for two scuppers

  • Thermoplastic elastomer resists UV and elements without curling
  • Repairs most flapper scuppers regardless of manufacturer
  • Kit services two scuppers of a given size
  • Includes 1-5/8 in and 1-7/8 in flappers per kit
  • All keepers and fasteners supplied for complete repair

Scupper Flapper Repair Kit

The T-H Marine Supplies kit repairs flapper scuppers on boats by replacing worn rubber flappers that curl and leak over time. It fits most scupper sizes regardless of the original manufacturer. Boat owners and marine technicians use it to restore proper drainage without replacing the entire scupper assembly.

For standard scupper maintenance, not custom fits

Suits owners of boats with traditional flapper scuppers needing a direct, drop-in repair. Builders working on non-standard scupper profiles or those requiring through-hull valves instead of flappers should look at other solutions.

Thermoplastic elastomer flappers resist UV

The kit supplies two 1-5/8 inch and two 1-7/8 inch flappers moulded from thermoplastic elastomer rather than rubber. This material withstands sun exposure and weather without deforming, keeping the seal tight longer. All keepers and fasteners for both sizes are included.

Highlights

  • Thermoplastic elastomer resists UV and elements without curling
  • Repairs most flapper scuppers regardless of manufacturer
  • Kit services two scuppers of a given size
  • Includes 1-5/8 in and 1-7/8 in flappers per kit
  • All keepers and fasteners supplied for complete repair

Specifications

BrandT-H MARINE SUPPLIES

Questions about this item

Will the 1-5/8 in and 1-7/8 in thermoplastic elastomer flappers fit the scupper bodies I already have on the boat?

The kit includes both sizes to repair most flapper scuppers regardless of manufacturer; match the flapper diameter to your existing scupper opening for a proper seal.

How can I confirm the new flappers are sealing correctly once installed?

After fitting the flappers with the supplied keepers and fasteners, run water over the scupper — water should exit freely and the flapper should close tightly with no back-flow or leakage.

What components come in the box and is any additional hardware required?

The kit provides two 1-5/8 in flappers, two 1-7/8 in flappers, and all necessary keepers and fasteners to repair two scuppers; no extra parts are needed.

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