TJTC Stainless Steel No Hub Coupling - China Suppliers Factory, NSF UPC CSA Certified for DWV Drain Waste Vent Systems

• Our TJTC No Hub Coupling (also known as mechanical joint coupling / MJ coupling) is a professional flexible pipe connector designed for hubless cast iron drainage pipelines, widely used in drain, waste and vent (DWV) plumbing systems in North America.
• The integrated corrugated stainless steel shield evenly distributes clamping pressure, protects the rubber liner from external impact and underground soil corrosion, while the elastic rubber gasket offers great deflection, vibration absorption and leak-proof sealing performance.

1. Outer Shield & Clamp Band: Premium 304 stainless steel, anti-rust, acid & sewage resistant, long service life for buried & above-ground installation
2. Fastener Bolt & Nut: Stainless steel screw assembly, stable clamping force, easy torque tightening without special tools
3. Inner Sealing Gasket: High-performance EPDM rubber, resistant to wastewater, aging and temperature fluctuation; optional CR neoprene gasket available
4. Structure Type: Single clamp / double clamp shielded coupling, sizes range from 1-1/2" to 15" inch to meet all standard pipe diameters

All TJTC no hub couplings pass strict third-party testing and hold full North American official certifications for engineering inspection:

• NSF/ANSI 14 – National Sanitation Foundation certification for plumbing contact with potable & waste water
• UPC – Uniform Plumbing Code certification, meets US domestic plumbing construction codes
• CSA – Canadian Standards Association certification, eligible for Canadian construction projects
• Industry Standards: CISPI 310, ASTM C1277, fully acceptable for US & Canada building project acceptance

• Excellent Flexible Compensation: neoprene/EPDM liner allows minor pipe misalignment, thermal expansion and vibration damping, effectively prevent pipe joint cracking and leakage
• Simple Fast Installation: No lead pouring, welding or flanging required; just align pipes and tighten bolts with a torque wrench, cut construction labor cost greatly
• Multi-material Compatibility: Connect hubless cast iron pipe, PVC drain pipe, ABS pipe interchangeably for renovation and new construction
• Heavy-duty Anti-extrusion Shield: Corrugated stainless steel outer cover avoids rubber gasket extrusion under soil pressure for underground buried pipelines
• Noise Reduction: Cushioned rubber structure isolates water flow vibration, lowers drainage noise inside buildings
• Wide Application Temperature: Stable sealing performance under -30℃ ~ 100℃ working environment

• Residential high-rise DWV drain, waste and vent pipelines
• Commercial buildings: hospital, hotel, shopping mall, office basement drainage system
• Underground buried cast iron sewage pipe network
• Old building cast iron pipeline repair & renovation
• Cross-material pipe transition connection (cast iron to PVC/ABS)
• North America export plumbing engineering projects (USA, Canada mainstream drainage fitting)

• Available Sizes: 1.5", 2", 3", 4", 5", 6", 8", 10", 15" inch
• Standard Gasket: Black EPDM rubber/neoprene
• Optional Accessory: Stainless steel repair clamps, pipe hangers, coupling accessories
• Packaging: Carton packaging with inner plastic bag, customizable logo & label printing