I have mine set at 55 psi. I was at one place in CA where the spigot pressure was 130 psi. It was while I was volunteering at Deukmejian Wilderness Park in La Cresenta CA. They were on a well pump for the entire park so it was set high.
I believe that the water system in our Monaco coach has been tested to 100 psi but I would never run it much beyond 60 psi.
Dr4Film ----- Richard
2002 Monaco Windsor PBT 40Ft. (R HOME) - 30Ft. 2006 Pace Trailer (R JUNK). Trailer Has 06 VUE (R TOWD) 04 Victory Alen Ness Edition (R RYDE). Full-Timer for 14 Yr's BUT now a Part-Timer. Cummins ISC-350 With Banks Power Pack and Upgraded PRXB PacBrake.
We are at our Winter Home in Flagler Beach FL