‘317’ Series Pump and Gauge Assembly c/w Quick-Connect CouplingFeaturing a self-testing metal hand pump and precision gauge, with specially designed pressure release valve for safe de-pressurising cooling systems.Ideal for detecting leaks in radiators, heater matrix, hoses, cylinder heads, engine blocks, water pumps etc.317 series pump assembly can also be used with more modern 315 Series Cooling SystemCap Adaptors, as they use the same quick-connect coupling and fittings