
Fire Sprinkler Grooved Rigid Coupling Ductile Iron Pipe Connection Fitting Coupling. Ductile Iron Construction: Housing made of ASTM A536 ductile iron for superior strength and durability. Wide Size Range: Available in sizes 1" to 12" (DN25-DN300) with custom options. Multiple Coupling Types: Offers rigid, flexible, angle pad, reducing, high-pressure, and quick-install options. Leak-Proof Gasket: EPDM or Nitrile gaskets provide excellent resistance to UV and chemicals. High Pressure Rating: Standard rating up to 300 PSI (2.5MPa), high-pressure models up to 600 PSI. Comprehensive Certifications: Certified by FM, UL, CE, ISO, and ISO45001/9001/14001 standards. 24-Month Warranty: Covers mechanical defects with after-sales service support for two years. Customization Support: Supports LOGO, color, size, and design customization with OEM/ODM services.