think of a pressure-relief valve as a safety device that — when the pressure starts to build — opens and allows the water to escape through a designated outside channel. Pressure-reducing ...

The water might be coming from the temperature and pressure relief valve (T&P valve), though. To make sure the drain valve is ...

and relief valves. Pumps in hydrostatic pressure testing equipment should be able to deliver the pressure and water volume needed for desired tests. Gauges, which may be mechanical or may appear on a ...