Are there different types of Storz gaskets?
In general, there are two different types of Storz gaskets, namely Pressure gaskets and Suction gaskets and they operate in different ways. It is important, when ordering, to specify the application so that the correct coupling or adapter, with the proper gasket, is supplied. The gaskets, although similar, are generally not interchangeable. The Pressure gasket has a lip, or flap, that is open to the inside, facing the water. As the line is charged, the lip pushes out tighter and tighter against the lip of the gasket in the mating coupling to make a waterproof seal. The coupling torque to assemble two mating pressure couplings is small so that the couplings can easily be connected. Water may leak out until the pressure in the line rises to push the flaps together. On the other hand, Suction gaskets have a flap on the outer rim, facing the outside. The coupling torque to assemble mating suction couplings is higher so that these flaps on mating couplings are pressed together initially, se
