LASCO RV520 Brass Water Pressure Regulator Female Hose Thread by Male Hose Thread, 3/4" x 3/4" Brass construction for strength and resilience 3/4-inch female hose thread by 3/4-inch male hose thread, in-line Regulates incoming water pressure to 40-50 PSI Protects RV plumbing system against high pressure Made in USA