NSF & UPC Certified No‑Hub Pipe Couplings — Stable Supply of Our Core Mature Plumbing Fittings
The coupling shell is integrally fabricated from 304 stainless steel, with external rib reinforcement to enhance structural rigidity. It absorbs axial and radial displacement caused by pipe thermal expansion, minor ground settlement and equipment vibration, effectively eliminating cracking and leakage problems of traditional rigid joints. The inner seal adopts aging‑resistant neoprene rubber as standard, with optional EPDM liner for different working fluids. Compatible with potable water and general sewage, the seal delivers excellent anti‑aging and antimicrobial performance in line with European and North American plumbing codes.
Adopting the proven weld‑free no‑hub design, the fitting requires no hot work or concrete anchoring on site. Simply align pipe ends and tighten dual bolts to complete connection, which greatly cuts labor cost and construction time for new piping and pipeline retrofitting. Popular sizes including 3” and 4” can be installed quickly by one worker, ideal for sewage systems of commercial complexes, residential drainage pre‑installation and municipal pipeline renovation.
All units hold NSF potable water certification and UPC plumbing certification, with compliance marks stamped on the shell and official NSF labels attached. Complete certification packages support smooth inspection by supervisors and third‑party labs across North America, the Middle East, Southeast Asia and more markets. Stock sizes cover 2”‑6” mainstream diameters with regular inventory; customized options for rubber material, surface finish and packaging are available for bulk orders.
Proven by years of field application, this flexible coupling features low leakage rate and stable service life, ranking among our top export items serving plumbing projects worldwide. For overseas buyers, we provide full certification documents, sample testing, consistent bulk lead time and technical sizing support. Leveraging our mature supply chain, we guarantee fast delivery for regular orders and flexible customization, helping global projects reduce leakage risks and overall procurement expenses.
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