Demand Water Pump - dumb question
Our rig has a "demand" water pump. I know that when the pump is powered, it'll come on if the outside water pressure drops below a certain point. What I don't know is where the pump is then getting...
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Pump draws from the onboard tank only. You don't use it when hooked up to shore water source. It is not intended to be a pressure booster for low pressure shore water. If you use it as such, it will attempt to pump water back into the shore water supply, which should lock up the back flow preventer valve required to be in your shore water inlet and you will wind up ONLY using water from the fresh water holding tank. If the back flow preventer does not do its job, you risk contaminating the shore side water system with whatever possibly untreated water is in YOUR fresh water tank, which is why there is required to be such a preventer valve.
