
Fire Fighting System Ductile Cast Iron Grooved Pipe Fitting/Coupling Plumbing Connection. Ductile Iron Construction: Housing made of ASTM A-536 ductile iron grade 65-45-12 for high strength. 300 PSI Working Pressure: Rated for 300 PSI (2070 kPa) working pressure across all sizes. Multiple Gasket Options: Available with EPDM, Silicone, or Nitrile rubber gaskets for various fluids. Customizable Coatings: Colors and coatings customizable including Epoxy, Painted, Galvanized, and Dacromet. Wide Size Range: Available in nominal sizes from 1 inch to 12 inches (25mm to 300mm). Grade 8.8 Bolts: Bolts and nuts are heat-treated plated carbon steel meeting Grade 8.8 standards. 10-Year Warranty: Comprehensive 10-year warranty coverage for product reliability. OEM/ODM Support: Full OEM and ODM services available with 2 dedicated R&D engineers.