First time camping in my new to me 94 Itasca-spirit. When I first attached the hose to the campgound city water, after a while I noticed that the spout for for fresh water was leaking out some water; I thought than when using the city water connection, there is a bypass valve that lets the water go right to the toilet, shower and other sinks bypassing the pump. Did I do something wrong? or is the valve not working properly? I'm a newB with little experience with this type of motorhome, any help would be greatly appreciated. thanks.