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About product and suppliers:
        Alibaba.com offers 8,096 coupling union connector products. About 79% of these are pipe fittings, 2% are connectors. 

A wide variety of coupling union connector options are available to you, such as elbow, union, and coupling. You can also choose from plastic, copper, and carbon steel. As well as from male, female, and welding. And whether coupling union connector is forged, or casting. 

There are 8,115 coupling union connector suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of coupling union connector respectively. 

Coupling union connector products are most popular in Southern Europe, Northern Europe, and South Asia. 

You can ensure product safety by selecting from certified suppliers, including 1,787 with ISO9001, 575 with Other, and 361 with ISO14001 certification.