NSF/UPC Certified SS301/304 Stainless Steel No Hub Couplings 1.5"-15"

Product Introduction

This TJTC no-hub coupling, also called cast iron soil pipe coupling, is certified with NSF, UPC & CSA approvals to meet North American plumbing codes. It is equipped with double stainless steel worm drive clamps on both sides, the serrated steel band can evenly compress the inner EPDM rubber sleeve to form a tight leakproof seal for connecting hubless cast iron drain pipes. Double-clamp design delivers stronger clamping force than single-band types, ensuring stable sealing under ground burial or high-temperature indoor drainage environments. Standard dimensional specifications range from 2" to 12", matching mainstream US cast iron soil pipe sizes.

Material Specification

• Stainless steel 304, with embossed serrated texture and uniform pressure distribution, has excellent rust prevention performance against damp sewage and underground soil corrosion.
• Internal sealing gasket: NSF certified EPDM/chloroprene rubber, resistant to aging, chemical erosion from sewage, and temperature fluctuations from -30 ℃ to 100 ℃, in compliance with US drinking water and hygiene standards.
• Fastener bolts and nuts: 304 stainless steel, treated with anti-corrosion, suitable for long-term outdoor and underground installation.

 Similar Products

• Single Band No-Hub Coupling: Only one stainless steel clamp, for low-load indoor above-ground drainage with lower cost.
  
• Transition Coupling: One end for cast iron pipe, the other for PVC/ABS plastic pipe, used for mixed-material pipeline conversion.
• Flexible Expansion Coupling: With thicker rubber body to absorb pipeline thermal expansion and building settlement displacement.
• Compression Shield Coupling: Extra outer steel shield for heavy-duty underground burial projects.

 Application Scope

•  Sanitary Drainage System

         Primary connection fitting for hubless cast iron drainage pipes in residential buildings, apartments, commercial malls and hotels across USA & Canada, UPC/NSF certification is required for local plumbing inspection                                       approval.

• Municipal & Civil Engineering

        Underground sewage pipeline connection for municipal drainage, basement waste water discharge and underground parking lot drainage pipelines.

•  Industrial Wastewater Project

        Low-concentration industrial wastewater discharge piping for food processing plants and light manufacturing factories, compatible with acid/alkali dilute sewage due to EPDM rubber chemical resistance.

 Certification Notes

•  NSF: National Sanitation Foundation certification, qualified for potable water & sanitary drainage application
•  UPC: Uniform Plumbing Code certification, mandatory for US local plumbing engineering acceptance
•  CSA: Canadian Standards Association certification, eligible for Canada market clearance & construction inspection

 Packaging and Transportation

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