I am working on a Hobart AM14 and the things runs great except during fill and rinse when the fill valve/solenoid opens the water pressure drops from 25 psi to 15psi then 10psi within 2 seconds. I have tried adjusting the Watts water pressure regulator (model say 10-40 psi) when the solenoid is open and I still can't get it to 20psi. There seems to be no leaks in the the piping. when the solenoid closes and rinse stops the pressure slowly sneaks back to 25psi. Any ideas?
PS this machine is set for chemical and no heat booster.