TJTC China No Hub Coupling Factory Supplier - NSF UPC CSA Certified Stainless Steel Drain Waste Vent System
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 (FAQ)
Q: What is a No Hub Coupling (MJ Coupling) used for?
A: It is a flexible pipe connector designed for hubless cast iron drainage pipelines, commonly used in drain, waste, and vent (DWV) plumbing systems.
Q: What materials are used to construct TJTC No Hub Couplings?
A: The outer shield and clamp bands are made of premium 304 stainless steel. The sealing gasket consists of high-performance EPDM rubber (with optional CR neoprene), and the fasteners are stainless steel screw assemblies.
Q: Are these couplings certified for North American construction projects?
A: Yes. All TJTC no hub couplings hold NSF/ANSI 14, UPC, and CSA certifications, and fully comply with CISPI 310 and ASTM C1277 standards.
Q: Can these couplings connect different types of pipe materials?
A: Yes. They support multi-material compatibility, allowing you to connect hubless cast iron, PVC drain, and ABS pipes interchangeably.
Q: What sizes are available for TJTC No Hub Couplings?
A: They are available in sizes ranging from 1.5" up to 15" inches to meet standard pipe diameter requirements.
Q: Do these couplings require special tools for installation?
A: No. They offer quick and simple installation. You only need to align the pipes and tighten the bolts with a standard torque wrench.