Flush Mount Scupper Flapper Adapter

Product Description

Enhance your boat’s drainage system with our Flush Mount Flapper Scupper Assembly—a resilient, marine-grade solution designed for worry-free performance.

Crafted with a curl-proof thermo-plastic flapper, this scupper is impervious to sun damage, chemicals, and moisture—unlike traditional rubber that may curl, rot, or lose its seal over time. The universal hole pattern and grooved inner flange allow seamless replacements for worn-out scuppers from other brands 

Installation is flexible: mount over 1″–1¼″ drain tubes or directly attach to a 1½″ thru-hull using four screws for a secure and watertight fit . With an attractive 2‑7/8″ trim ring, it also delivers a clean, finished look to your deck 

Why It Stands Out:

• Thermo-plastic flapper resists curling, rot, and degradation—promising longevity in harsh marine conditions

• Versatile mounting options and universal compatibility make retrofitting easy and cost-effective 

• Secure groove design ensures reliable sealing over flange fittings 

• Compact dimensions deliver sleek integration without compromising functionality

Product Specifications 

• Mounts Over: 1″ to 1‑1/4″ drain tubes

• Mounting Options: Over drain tube or directly to 1‑1/2″ thru‑hull using four screws 

• Universal Hole Pattern: Designed to retrofit and replace defective flapper scupper assemblies from other manufacturers 

• Grooved Interior: Fits securely over drain tube flanges, ensuring a watertight seal 

• Dimensions:

  • Outside trim ring diameter: 2‑7/8″