Camco Brass Water Pressure Regulator with Gauge- Helps Protect RV Plumbing and Hoses from High-Pressure City Water - Easy Read Gauge, Lead Free (40064) Helps protect RV plumbing and hoses from high-pressure city water Attaches easily with 3/4" garden hose threads Pressure is factory pre-set at 40-50 PSI Easy to read gauge indicates the regulated pressure Drinking water safe and 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