HDPE Electrofusion Coupler Electrofusion Welding Pipe Fittings Coupling Tee. 50-Year Service Life: Designed for long-term durability with a lifespan exceeding 50 years under normal conditions. Wide Size Range: Available in sizes from DN20mm to 1600mm, covering OD 20-315mm for various applications. Certified Quality: CE, SGS, ISO, CNAS, and IAF certified, compliant with international water supply standards. Customization Options: Offers SDR11/13.6/17 pressure ratings, custom material suppliers, and flexible packaging sizes. Secure Electrofusion: Features internal brass wire for secure, leak-proof connections using electric fusion welding machines. Precise Manufacturing: Lean production with sophisticated injection molds ensures accurate dimensions and no deformation. Comprehensive Warranty: Provides a 3-year warranty and available after-sales service for all purchased products.