Flapper only for Rectangular Stainless scupper

Product Description

Upgrade your boat’s drainage system with our Rubber Boat Scupper Flapper Replacement, specially designed to fit polished 316 stainless steel rectangular boat scupper flanges commonly used on sport fishing boats and larger vessels. Crafted from durable, stiff rubber, this replacement flapper ensures reliable water drainage while effectively preventing backflow, keeping your boat dry and comfortable in all marine conditions.

The flapper's robust construction guarantees long-lasting performance in harsh saltwater environments, making it a dependable component for your boat’s scupper system. Installation is simple and straightforward — just sandwich the rubber flapper between your existing scupper flange and the transom, then secure with two of the four mounting screws or bolts (not included).

Whether you're replacing a worn or damaged flapper or upgrading your scupper system for optimal water management, this marine-grade rubber scupper flapper offers a perfect fit and seamless integration. Trusted by boat builders and marine enthusiasts alike, it enhances your vessel’s functionality and durability.

Product Specifications:

• Dimensions: 5-1/2" length x 2-3/4" width

• Mounting Hole Spacing: 4" center-to-center

• Material: Stiff, marine-grade rubber

• Compatibility: Fits polished 316 cast stainless steel rectangular boat scupper flanges