China TJTC Stainless Steel No Hub Coupling - NSF UPC CSA Certified DWV Pipe Connections from Trusted Suppliers & Factory
Product Overview
- 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.
Material Construction
- 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
Certifications & Compliance (Core Advantage)
All TJTC no hub couplings pass strict third-party testing and hold full North American official certifications for engineering inspection:
Key Features & Benefits
- 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
Application Scenarios
- 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)
Product Specifications
- 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
Frequently Asked Questions
They are designed for hubless cast iron drainage pipelines and are widely used in drain, waste, and vent (DWV) plumbing systems, including residential high-rises, commercial buildings, and underground sewage networks.
The outer shield and clamp bands are made of premium 304 stainless steel for rust and corrosion resistance. The inner sealing gasket is made of high-performance EPDM rubber (or optional CR neoprene) to handle wastewater and temperature fluctuations.
Yes. TJTC No Hub Couplings are fully certified under NSF/ANSI 14, UPC, and CSA standards. They also comply with industry standards CISPI 310 and ASTM C1277, making them eligible for official engineering inspections in the US and Canada.
Yes, they feature multi-material compatibility, allowing you to connect hubless cast iron pipes, PVC drain pipes, and ABS pipes interchangeably for both new constructions and renovation projects.
We offer a wide range of standard sizes to meet various pipe diameters, including 1.5", 2", 3", 4", 5", 6", 8", 10", and 15" inches.
The integrated corrugated stainless steel shield distributes clamping pressure evenly and protects the inner rubber liner from external impact and underground soil corrosion, preventing gasket extrusion under heavy soil pressure.