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High-Quality China Stainless Steel No Hub Coupling - DWV Solutions from Authorized 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
- Outer Shield & Clamp Band: Premium 304 stainless steel, anti-rust, acid & sewage resistant, long service life for buried & above-ground installation.
- Fastener Bolt & Nut: Stainless steel screw assembly, stable clamping force, easy torque tightening without special tools.
- Inner Sealing Gasket: High-performance EPDM rubber, resistant to wastewater, aging and temperature fluctuation; optional CR neoprene gasket available.
- 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:
- 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
Key Features & Benefits
- Excellent Flexible Compensation: Neoprene/EPDM liner allows minor pipe misalignment, thermal expansion and vibration damping, effectively preventing 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, greatly cutting construction labor costs.
- Multi-material Compatibility: Connect hubless cast iron pipe, PVC drain pipe, and 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, lowering drainage noise inside buildings.
- Wide Application Temperature: Stable sealing performance under -30℃ ~ 100℃ working environments.
Application Scenarios
- Residential high-rise DWV drain, waste and vent pipelines.
- Commercial buildings: hospital, hotel, shopping mall, and office basement drainage systems.
- Underground buried cast iron sewage pipe networks.
- Old building cast iron pipeline repair & renovation.
- Cross-material pipe transition connections (cast iron to PVC/ABS).
- North America export plumbing engineering projects (USA, Canada mainstream drainage fittings).
Product Specifications
- Available Sizes: 1.5", 2", 3", 4", 5", 6", 8", 10", 15" inch
- Standard Gasket: Black EPDM rubber/neoprene
- Optional Accessories: Stainless steel repair clamps, pipe hangers, coupling accessories
- Packaging: Carton packaging with inner plastic bag, customizable logo & label printing
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Frequently Asked Questions (FAQ)
What plumbing standards do TJTC No Hub Couplings comply with?
Our couplings fully comply with major North American standards including CISPI 310 and ASTM C1277. They also hold official certifications from NSF/ANSI 14, UPC, and CSA, ensuring full approval for construction projects in the USA and Canada.
Can these couplings be used to connect different pipe materials?
Yes. TJTC No Hub Couplings offer multi-material compatibility, allowing you to connect hubless cast iron pipes, PVC drain pipes, and ABS pipes interchangeably for both repair and new installations.
What size ranges are available for these mechanical joint couplings?
We manufacture standard sizes ranging from 1-1/2" up to 15" to cover all standard DWV (drain, waste, and vent) pipe diameters.
Are these couplings suitable for underground buried applications?
Absolutely. The premium 304 stainless steel corrugated outer shield protects the inner EPDM/Neoprene rubber gasket from soil corrosion, roots, and external impact, making them highly reliable for buried underground installations.
What is the working temperature range of the rubber gasket?
The high-performance inner EPDM sealing gasket is built to withstand extreme temperature fluctuations, maintaining a tight, leak-proof seal within a working environment of -30℃ to 100℃.
Do I need special tools to install TJTC No Hub Couplings?
No, special heavy machinery is not required. You only need to align the pipes and tighten the stainless steel fasteners to the recommended torque using a standard torque wrench.