I picked up a '79 Santana camper van and if you connect city water to the outside fitting, water comes out the sink faucet continuously. Itâ€™s an electric faucet that has a switch which turns on the pump to make water flow so you canâ€™t turn off the flow if there is pressure like when its connected to city water, which doesnâ€™t make any sense. Is it plumbed correctly? The fresh water tank is on the right. The manual fill is the large fitting up and to the back. The white hose going back is the drain, and to the left is to the pump. The gray hose going back is to the city water connection and then the hose going under the carpet is to the faucet. Shouldnâ€™t the city water be connected to the pump so a check valve would prevent the electric faucet from continuously flowing until it was switched on?