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The pressure switch will fit in the pipe just after the water inlet. When a tap is turned on, the pressure switch detects a drop in pressure and switches the pump on. The surge damper is a tube with a spring operated plunger. When the pump switches on the damper fills with water, then the pump switches off whilst the spring empties the damper. It stops the pump switching on and off too frequently and allows a slow flow of water from the tap. The flow can be varied by turning the tap just like at home.
The microswitches fit to the bottom of every tap. When a tap is turned on, it operates the microswitch which switches the pump on. But the pump runs all the time, so you have to accept a fast flow or none at all. There is a microswitch on every tap, so more to go wrong as they do frequently.
All modern vans have the pressure switch and surge damper.
In line pressure switch: http://www.whalepumps.com/caravan_RV/product_list/16/88/
Surge damper: http://www.whalepumps.com/caravan_RV/product_list/16/75/
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Topic: abi Marauder
