Stainless Steel Flapper Boat Scuppers by Seaworthy Innovations.

Check out our new patent-pending scupper line which is available Sept 2021.
These scuppers not only look much better than the traditional rubber flapper scupper but they perform better as well. Our unique hinged stainless steel door and silicone seal design is able to create a significantly improved seal when compared to the traditional rubber flapper scupper.
The 1.625" thru-hole size (on the non-barbed versions) is larger than the common plastic frame version which typically has a 1.375” thru hole. This means ours will fit over standard flared brass drain tubes (usually a ~1.5” flare). The VHB tape version can be attached directly to gelcoat, epoxy paint, or aluminum without any screws!
Our thru-hulls are attached to the outside of the hull for a simplified installation. This eliminates the need for very long fittings to accommodate different transom thickness. It also allows for hoses to be routed in tighter spaces.
These are intended for self draining cockpits and engine wells only.

[@JamesWhite-tg4kw]

So what keeps the scupper closed when the boat is tied off to a dock an waves are moving the boat up and down in the water. Thanks they look awesome 👌

[@iliaortho]

I wonder as well