Been using the off the shelf brass in line, non adjustable Tetford. or CAmco for 40 Year’s. Never blew out my plumbing yet. Some parks are pumping enough psi to pressure wash your ride, if not dialed back. Normandy Farms in Mass. clocks in at 125 psi! How bad did you want that sandblasted shower?
Get a quality shower head, lots cheaper than floods, and blowouts. Just my two cents...! Camper plumbing is happiest at less than 50 psi. If you’are on hose hook up, take out your flow restrictes. Free fix!!!
GoodLuck,
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