We have a 2003 Alpenlite 5th wheel. Our old fresh water pump quit working so my husband installed a new one. Now even though we don't keep fresh water in the tank (we are on city water) the tank keeps...
The check valve is not closing. What was make and model of old pump? What is make and model of new pump? Does it pump water with good volume and pressure? If, no check input and output of pump to insure it is in correctly.