This is used for visual checking of water flow and water filling of pipe at test point. To be installed in main drain lines and inspection test pipes. Working pressure : 175Psi Test pressure: 300Psi Connection: 1” BSP thread Related ProductsSRI Sprinkler Alarm Valve 150mmSRI Sprinkler Alarm Valve 100mmSRI Single Low Pressure ControlSRI Pendant Sprinkler Head