Municipal water is moved through every city’s system at 150-200psi. Every facility’s internal water meter has to reduce that pressure to 50-80psi to accommodate it’s internal plumbing. That process creates air. The air goes through the meter. Every company in the world is paying for that air as it passes through the meter-the meter can’t tell the difference. CMP Water’s Valve pushes that air back up into the system so that you pay only for the actual water that you’re using. CMP Water’s Valve is proudly made in America.