Scupper - 38MM
One way scupper for the hull normally from the cockpit going out or from a bilge pump, simply needs a 50mm diameter hole drilled to suit. Always install above the waterline it has a lightweight rubber flapper that allows passage of water in one direction (out). The hose tail on the end accepts 38mm internal diameter hose, convenient for cockpits above the waterline and outlets through the hull only above waterline.
Construction of white plastic, use construction adhesive or similar to bed into hull.