I don't know what non-adjustable regulators work for, but I didn't have enough pressure in my RV to take a decent shower. I fitted this in, gradually increasing the pressure until I found a middle ground and now I have plenty of water that is well below the max pressure for my camper.
Enhanced Sewer Hose Swivel Fitting - Camco 39857 RhinoFLEX Clear 90 Degree
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VP 4
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Lippert Solid Stance RV Step Stabilizer Kit For 5Th Wheels, Travel Trailers And Motorhomes
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