Forespar Marelon Marine Plumbing provides strength, light weight and internationally approved underwater systems which will give you years of trouble free, corrosion free and electrolysis free use.
Marelon® is the modern material for marine plumbing systems. It's non-corrosive proprietary formulation polymer composite compounds uses resins and additives to produce a superior marine-grade product that will not deteriorate like traditional bronze marine plumbing parts.
The Marelon Integrated System valves were specifically designed for production boat builders. The complete system comes with a flush or mushroom head "buttress" threaded thru-hull for exceptional strength.
When the complete system is used Forespar supply an emergency thru-hull plug as a cap in the handle. All configurations meet or exceed ABYC standards, are U.L. Approved and ISO Certified.
To view Installation Instructions, Maintenance tips, Certifications and more visit the Forespar Marine Plumbing Buying Guides.
Know Your Thread Forms
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.
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.