Reducers & Adaptors

Molded from high-strength Marelon. Zero corrosion and light weight. zero corrosion, zero electrolysis, light weight and strong Marelon.



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Forespar® Plumbing is made of Marelon® a superior marine-grade product.

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MARINE thru-hulls, tailpipes, valves and seacocks have parallel threads known as “American Standard Straight Mechanical” pipe threads or “NPSM”. These require thread compound or Teflon tape to seal.

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Marelon® - Marine Grade Plumbing Systems

In the late 1970’s we (Forespar) undertook a search for a material that could replace the traditional bronze plumbing components used in boats.

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