ct0218
Well-Known Member
Our mountain lakes are quite cold except for a short time in the middle of summer, so I plan on adding a water pump and tankless water heater for use as a shower system on board. When researching pumps, I found both RV/boat water system pumps and boat washdown pumps. I asked at several boat dealers and none had a clue which type pump I needed. The heater requires a diaphragm water pump producing a minimum of 35 PSI at 3.5 GPM. Since I'll be pumping out of the lake, it will need to be a self priming pump. Does anyone know the difference between the two pumps, and which I would need?