Stop damage to your RV water hose, pump, or internal lines from inconsistent water pressure in campgrounds. Reduce water pressure to a safe, consistent 40 to 50 PSI of operational pressure. Protects equipment and prevents hose failure, helping to prolong equipment life. Available in durable ABS plastic or brass. 3/4' Male x Female garden hose threads. Patented. Brass regulator is 2010 compliant.