RV Repair: RV water system, manual valves, manual valve

Question
I was trying to get my 2004 toyhauler all ready for the new season.  Filled the fresh water tank and turned the water pump on and it pumps water straight out the hose that you use to hook to city water.  When I plug my house hose directly into the trailer all faucet work just fine.  but with water pump it just pumps straight our the hose for city hook up.  Help!?

Answer
If you dont have a manual valve on the outlet of the pump, that closes off the city water, then you possibly have a one way valve on the city water line that is not working right.  City water goes in, stopped by the pump it can only go to the faucets.  Pump water comes on, the one way valve closes the path out the city water hook up and can only go to the faucets.  You may find manual valves that do the same thing.