GEM Forged Thru-Hulls are a revolutionary new product, utilizing nylon 6/6 adapters to achieve endless plumbing capabilities.

  • Single piece forging process ensures a higher and more consistent quality
  • Compliant with ABYC 500# static load testing
  • Unlimited plumbing capabilities by using Nylon 6/6 adapters to fit your application.
  • New "Duck Bill" product improves the age-old flapper system currently used by many.
  • Only two different hole saw sizes, and one man installation reduce installation time