Water pump issues

[decodancer]

I've been full time for the last 7 years but usually always hooked up to city water at workamping jobs. I'm now set up on property and need to exclusively use my pump to get water from my holding tanks. It is working fine but cycling on briefly every few minutes. I've search3d for a leak and ca not find one. I do hear what seems to be backflow as it cyles on. There are 3 valves and not sure if they are set right, would be great if that were the only issue. If not, any ideas? The pump is less than 6 months old. Rv is 95 Tioga class C. Thank you in advance for your help.

[BFlinn181]

The pump cycles because the water pressure has dropped to the point the pump kicks in to increase to the set pressure. Usual culprit is the check valve located just as the tank water enters the pump. A small bit of grit is enough to allow water to leak back towards the tank. Often taking the valve apart and cleaning it will solve it, many pump brands have replaceable check valves. Another solution is just to buy a check valve and install it in the line between the pump and the water tank.