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.
What does an unloader valve do? It's attached to a gas pressure washer pump and its job is to safely control/direct the flow of water into your pump. To keep your pump from being damaged. When you pull the trigger on your spray gun, the unloader valve opens wide to send your water through the pump. Then the pressurized water flows through your spray wand tip. And, when you stop spraying, it closes and it redirects the water through a hose and it is recycled through the pump again.