New seacock for the galley drain mounted to reinforcing fiberglass donut. The donut is made from fiberglass stock and epoxied to the hull. The seacock itself is made by Groco of marine bronze and is heavy duty. The old inline valves were held in place by threading onto the mushroom head (the fitting visible on the exterior). This seacock also threads onto the mushroom fitting but is additionally held in place by stainless bolts attaching the flanges to the fiberglass donut. Very secure!