I used to use the pre-set regulators that ran from 45-50 lbs. This year I bought an adjustable regulator with a gauge so that I can take advantage of pressure over 50 lbs. I have set it at 55 lbs. which is safe for RV plumbing. It is amazing what the extra 5 lbs. of pressure means for a shower, flushing and washing dishes. Feels just like home. Well worth it. BTW, if park pressure is less than what the regulator is set for it does not hinder the water flow. The regulator does not restrict pressure until it exceeds the limit it is set for. There is a diaphragm inside that regulates this.