Just happened
I have been having a pressure drop in my good pump at my wash on my wash cycle, about 200 psi.Over the last few days I have replaced 1/4 inch poly pipe and push connectors. I still had a few bubbles through my ounces per minute site gauge, I rinsed my screen at my hydro minder soap tank.This took care of the air problem,pressure dropped more to 300 pounds.Very hard pulsing.I checked my cold water supply by taking the fitting off at the pump, dropped it to the floor, good flow. When I turn the cold cycle on in the bay, the supply line, a clear plastic hose with a steel coil, did not leak.On the cold cycle this line will pressurize from the pump back to the hot water tank check valve.Opened the lid on the tank, could not see any back flow.I disconnected the hose from the check valve for a finical check of the valve. Removed valve, valve good. At this point I noticed a small bulge in the supply hose. The supply hose, about a year old had delaminated.When the pump created vacuum on the wash cycle, the feed hose collapsed. Problem solved. Pete