A must have for RVers. Water pressure regulators stop damage to your RV water hose, pump or internal lines from inconsistent water pressure in campgrounds. You will find this accessory a life saver if you haven't used it and water pressure has caused havoc on your RVs water lines. Reduces water pressure to a safe, consistent 40-50 pounds of operational pressure. Protects equipment and prevents hose failure, to help prolong equipment life.