Qball57
New Member
First time poster, and sorry if this has be asked before. I just had a new well drilled and they installed a constant pressure system with the Grundfos CU301 controller. I have no idea the actual pump installed. My question is, the unit is set at 60psi, when opening just one or two faucets, the pressure will slowly drop to around 50 then go up to 60. When doing things like watering the yard from a couple of hoses, the system runs at a constant 60 psi. Also when the pump shuts off the pressure peaks to around 65-67 psi and stays there until water is turned on again. My installer said this was normal, but just wanted to make sure. I have double checked the air tank and it is set at 70% of the 60psi. Thanks for any input.