Pumps with a metal casing may cost up to double the price of a similar pump without the casing. For instance, the price of a Â½-horsepower stainless steel or brass core pedestal pumps can run between $280 and $500.
A shower pump is an electric pump that is used to maintain a steady flow and pressure of water in a shower. The pump works best on stored water as compared to water that comes directly from the mains. With a shower pump, the fear of water suddenly stopping when you are taking a shower is eliminated.
Pressure Washer Unloader Valve-Pressure Regulator. The pressure cleaner's unloader valve functions as a safety device. Unloader valves control the direction of the flow of water exiting the pump. A positive displacement pump always delivers water, regardless of whether the spray gun is open or closed. âFlow Actuatedâ unloader valves respond to the interruption of water flow to the nozzle. 2  These valves sense any decrease in flow from the valve to the spray gun and initiate the bypass loop in response. 3  Unlike Trapped Pressure valves, no pressure is trapped, so no âkick backâ occurs when water is re-released.