Is this city or well water at the CG? I'm guessing well water. Many times the owner of the well will install a higher horsepower pump than needed. a 1/2 hp pump in the well will stir up and deliver twice the sediment that a 1/4hp pump will. The brass pressure reducer will clog up pretty fast. So will the aerator screens on the faucets and the 'water saver' reducer in the shower head. All screens can be easily cleaned out and the showerhead 'water saver' can be discarded in many heads. You can install an inline RV filter, but a 50micron will further reduce the pressure about 15-20%. A 25 micron will reduce pressure about 20-25%. Both will reduce pressure 80-90% when they clog up fast with high sediment delivery. Filters get expensive when you have to change them out weekly. Another option in a high water pressure situation is to change out all the RV plastic fittings and connections for regular household ones found in any hardware store. Sharkbites are the best for easiest replacement for all straight and T connections. Only use metal with rubber washers connecting faucets.