Helps protect RV plumbing and hoses from high-pressure city water Attaches easily with 3/4" garden hose threads Durable brass construction that is drinking water safe Reduces water pressure to a safe and consistent 40-50 lbs of pressure CSA low lead content certified. Complies with California's AB1953 and Vermont Act 193, Maryland HB 372, and Louisiana HB 471 Low Lead Content Laws Camco RV Brass Water Pressure Regulator helps to protect the RV plumbing and hoses from damage caused by high-pressure city water. Reduce water pressure to a safe, consistent 40–50 lbs of operational pressure. Protects equipment and prevents hose failure, to help prolong equipment life. (FGH x MGH) Patented. For outdoor use only.