Molded Marelon offers superior strength and corrosion resistance. Marelon is lightweight, corrosion and electrolysis free, ideal for thru-hull valves. Marelon is a modern material formulation of polymer composite compounds that uses resins and additives to produce an extremely strong marine-grade product that will not deteriorate like traditional bronze marine plumbing parts.

An anti siphon valve introduces a small amount of air into the hose whenever a small suction is detected. This breaks the siphon and prevents flooding your boat. There is a tiny rubber "duck bill" valve that is critical to its proper function. If the rubber gets old and stiff it may not function properly putting your boat at risk.

Order the replacement part below under "May we also suggest".

Always measure the i.d. of the hose before ordering. Although we believe the boat categories this part is listed are accurate, there is no guarantee that your boat was built exactly as expected.