Years ago I was in Valley of the rogue, Oregon, state park and new to RVing did not have a water pressure regulator. Came back one afternoon and saw water pouring out of the front door, high pressure or a surge blew a fitting off the kitchen sink. Now I only operate from my tank and use gravity fill to fill the tank. I never hook up to the campground "city water". I have a good water pump and get the same water pressure each and every time I need water. Just turn the pump off when not using any water. Believe me if you ever have a flooded RV you will never leave the water ON when you leave for any length of time. Lesson learnd