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Industrial and commercial scenarios often face three major challenges: continuous operation, complex media and pressure fluctuations. Factory water supply and drainage require fittings with stable pre...
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Designed for straight-line reduction between two pipes of different diameters, the ASTM Standard UPVC Reducing Coupling offers a smooth, in-line transition that preserves fluid velocity and line pressure. It is widely used in long-distance water transmission lines where step-downs in pipe sizes are required.
Technical & Design Advantages:
Tapered Internal Wall: Gradually sloping internal transition prevents abrupt flow restriction, fluid turbulence, and pressure drop.
High Burst Pressure Resistance: Engineered with thick walls matching or exceeding standard pipe pressure ratings for safety margins during pressure spikes.
Simple & Secure Assembly: Standardized solvent sockets allow quick, clean, and permanent installation using standard solvent cements.
Applications:
Straight-line size reductions in municipal water mains.
HVAC water circulation lines and chiller loop adjustments.
Commercial swimming pool filtration line transitions.
Industrial process line step-downs.
Zhejiang Feiya Plastic Co., Ltd. is located in Zhejiang Province, adjacent to Yiwu — the world‑renowned capital of small commodities. It enjoys convenient transport links to coastal cities including Shanghai, Hangzhou, Ningbo and Taizhou, backed by well‑developed logistics networks.
Our journey started in 1992 as Jiangshan Sanjin Machinery & Hardware Factory. We strategically turned to PVC piping production in 2001 and registered our proprietary FEIYA brand in 2002. With over 30 years of industrial expertise, our 40‑acre factory boasts a building area of 50,000 m². As an original manufacturer for plastic pipes, fittings and valves, we serve domestic markets and export our products to more than 100 countries around the globe.
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