Scupper Through Hull 1-1/2"

The low profile head and recessed flapper provide a more attractive installation than the typical, external flapper scupper. The flapper is moulded of a flexible thermoplastic that is totally impervious to the effects of sun and chemicals found in the marine environment. These flappers will not curl up, rot, or lose their sealing ability. Barbed to fit 1 1/2" I.D. hose. Fits hulls thickness 16mm. Includes backnut.