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.

National Pipe Straight Mechanical (NPSM) threads used in marine fluid systems that requires thread compound or common PTFE pipe sealing tape tape to seal. The female component incorporates a straight, non-tapered thread with an inverted 30° chamfer of the male connector on the seat of the female. This is a mechanical seal.

• Thread type: 1-1/2" National Pipe Straight Mechanical
• Body diameter: 3-1/2"
• Body length: 5"
• Overall length (including handle): 7-1/2"