The Camco Brass RV Water Pressure Regulator with Gauge helps protect your RV or boat's plumbing and hoses from damage caused by high-pressure city water. It features an easy-to-read color-coded gauge. The pressure is factory pre-set at 40-50 PSI. The pressure regulator attaches easily with 3/4" garden hose threads. Maximum incoming pressure is 125 PSI. Durable, lead-free brass construction is drinking water safe. For outdoor use only.• Helps protect RV and boat appliances, plumbing fixtures, and hoses from high-pressure city water• Attaches easily with 3/4" garden hose threads• Durable, lead-free brass construction is drinking water safe• Easy-to-read color-coded gauge• Compliant with all federal and state level low lead laws• CSA certified to NSF/ANSI 372 Attaches easily with 3/4"" garden hose threads Durable, lead-free brass construction is drinking water safe 125 PSI maximum incoming pressure | Camco Water Pressure Regulator with Gauge