Live connection：union， also known as oil, a kind of pipe fittings, shape for three-dimensional polygon design, the inner layer is engraved with three-dimensional threads, the form of connection is a fixed joint and a live female joint matching use, both ends and the corresponding pipe threads are connected, the middle with PVC pad or rubber pad seal.

Purpose: mainly used for matching hardware accessories connection, can be installed in a variety of pipe interface.Because of the advantages of convenient installation and disassembly, joinings are widely used in civil construction, plumbing engineering, automobile manufacturing, shipbuilding and other industries.

Variety: ordinary connection, galvanized connection, stainless steel connection, plastic.

Specifications: mainly by the following: four points live connection,  1/2” union,3/4” union, 1” union, 1 1/4” union, 1 1/2” union, 2” union, 2 1/2” union, 3” union, 4” union.