Happens every now and then we run out of water in the tank after several days at anchor no matter how careful you are being there is only so much water on board. The main issue is the toilets will not flush as the draw is from the potable water tank and no water means no flush and an obligation to return to port.

The modification is to install a connection between the pressurized side of the potable water system and the pressurized side of the wash down pump. Using a solenoid valve and a filter to remove sediment and a few T connections is all it takes. This is the same connection all boats use to interconnect dock water to the potable water system except now it will be the washdown pump circuit.

Will add a 5a breaker in my panel to energize the solenoid just below my water pump breaker as this one needs to be off and visa versa when deactivating it. If I want lake water, turn off water pump breaker, turn on solenoid breaker, done deal.

This will work well for us as our boating waters are fresh water and almost drinkable. The idea is to use the feature when away from port for several days knowing we will probably run out. Will activate it when we take showers and maybe when we do dishes, the idea being to use less water from the tank.