Camco RV and marine Brass Water Pressure Regulator helps to protect the RV and boat plumbing and hoses from damage caused by high-pressure city water. Reduce water pressure to a safe, consistent 40–50psi of operational pressure. Protects appliances and plumbing fixtures and prevents hose failure, to help prolong equipment life. Female garden hose (3/4 - 11-1/2 NH) x Male garden hose (3/4 – 11-1/2 NH). Patented. For outdoor use only. Maximum incoming pressure is 125psi Stops damage to the Rv and boat water hose, pump, and internal lines from inconsistent water pressure in campgrounds by reducing water pressure to a safe and consistent 40-50psi of pressure Durable lead-free ABS plastic construction Protects appliances and plumbing fixtures and prevent hose failure 3/4"-11-1/2 NH Garden Hose Connections Compliant with all federal and state level low lead laws.CSA low lead content certified to NSF/ANSI 372