I have a 2016, 24ft Open Range Lite. The water pressure is the barely a steady stream. At home I hooked up without regulator and made no difference from using a 45psi. I traced all the lines, all hand...
If you get the same results with hot cold, pump city water, at all outlets, then I would guess something is wrong between the pump and city water tee, and the hot water and cold water tee.