China Suppliers Factory NSF/UPC Certified SS301/304 Stainless Steel No Hub Couplings 1.5-15 for Cast Iron Pipes
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.
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.
304 stainless steel, treated with anti-corrosion, suitable for long-term outdoor and underground installation.
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Application Scope
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.
Underground sewage pipeline connection for municipal drainage, basement waste water discharge and underground parking lot drainage pipelines.
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
National Sanitation Foundation certification, qualified for potable water & sanitary drainage application.
Uniform Plumbing Code certification, mandatory for US local plumbing engineering acceptance.
Canadian Standards Association certification, eligible for Canada market clearance & construction inspection.
Packaging and Transportation
