Check valve dedicated for firefighting systems, it is a mechanical device that permits liquids and gases to flow in only one direction, preventing flow from reversing. And it consists of four main components: the body, a disc, a spring and a spring retainer. Based on generally accepted norms and standards, the fire pipeline must be painted red to make it separate from other pipeline systems. It has good pressure resistance, corrosion resistance and high temperature resistance. It is UL listed, FM listed, and nationally recognized safety standards. Available in a variety of diameters starting from 2" up to 6".