Fits standard RV water hoses and garden hose fittings. Adjustable .Can be easily adjusted from 0 to 160 PSI.But be careful when water in RV is turned off to adjust pressure. Easy to use.Simple to connect to campsite water supply, reduces water pressure and protects your filter and hose from damage Sturdy and Durable.Use high-quality (Lead Free)brass DMV metal and male & female hose connection. The pressure gauge contains oil to reduce friction of internal components and Improve the life of regulator