2016 Improved Version. We have upgraded our brass regulator after examining other reviews; Our new lead-free regulator contains a more durable pressure gauge with oil to prevent friction of internal components, particularly low lead content, well under the lead free requirement, and comes with a 1 Year WARRANTY. | Lead Free. This regulator was modified to contain lowest amount of lead of any regulator on the market. Each batch of regulators is tested to contain less than .13% lead, well under the NSF lead-free requirements of .25%. Email us for a copy of our testing certification. | Regulator gauge contains oil to reduce friction of internal components and greatly increases the life of the product. | Compatible with all U.S. water sources, including 3/4" garden hose threads and NH threads. Contact us for any compatibility questions by clicking on our store name, "Cartlee", and clicking on the ask a question button. | Adjustable up to 160 PSI. Arrives with easy installation guide. Email us for an additional copy of the guide or quality control test.