tudorsailor
Well-known member
My fresh water system has a twin pump which is essentially 2 x Par Max 4. The pressure in the system gently drops over an hour or two and then the pump runs to restore pressure. There are no leaks and the accumulator is fine. I have been advised (by Vyv) that a bit of crud can stop the valve closing so that water drains back to the tank and lowers the pressure. I have looked at the service diagram for the Par Max 4 and cannot see a NRV. Is there one in the supply side? Is the "check valve" what I would take to be a non return valve?
Thanks
Thanks