Groco – Marine Seacocks, Thru-Hulls & Plumbing Hardware

Groco has been manufacturing premium marine plumbing hardware in the USA since 1906. Renowned for their bronze seacocks, thru-hull fittings, strainers, and marine valves, Groco products are the trusted choice of boat builders, marine surveyors, and serious cruisers who demand the highest quality in below-waterline hardware.

Why Groco is the Standard for Marine Plumbing Hardware

• American-made since 1906 – Over 115 years of precision marine hardware manufacturing in the USA
• Premium bronze construction – Naval bronze alloys that resist dezincification and corrosion in saltwater for decades of reliable service
• ABYC & USCG compliant – Seacocks and thru-hulls engineered to meet the strictest marine safety standards for below-waterline installations
• Trusted by marine surveyors – The brand that surveyors and yards specify for critical below-waterline hardware replacements

Popular Groco Products

Browse Groco bronze seacocks, thru-hull fittings, sea strainers, bronze valves, and marine plumbing hardware at LMC Shop.