Firefighting grooved Reduced coupling mainly used to secure the  firefighting equipment connection.  Includes several parts: gasket, and track head bolts & nuts. With bolts and nuts tightened. So, a leak-tight structure. Based on the corresponding rules and standards, the fire pipeline requires to be painted in red to make it separate from other pipeline systems. Possess good pressure resistance, corrosion resistance, and high-temperature resistance. And it is UL and FM listed and nationally recognized standards for safety. Available in a variety of diameters staring from 1*1.5” up to 3*4”.