Typically the whaleflo RV water pump is there to draw water from a storage tank,like if you fill it up before you go on your trip,and it’s going to distribute it throughout your RV.

If you in the master stateroom,it’s gonna send water to that,to showers,to your toilet possibly,so it is the pump that makes water go to your sinks and showers and so forth,and it works on demand.There’s a pressure switch on the head of the pump,so when you open the faucet in the galley,it’s gonna tell the pump to turn on.And when you close the faucet,it tells the pump to turn off. Pretty simple.