Assured Automation WM-NLC Series Lead Free Brass Water Meter 1/2" Lead Free Residential Water Meter Totalizer Measuring in Gallons NPT Threaded, Flow Rate 1-20 GPM (will measure as low as 0.25gpm) +/- 1.5% accurate in flow range, NSF 61 Annex G Certified Couplings Included, Horizontal Installation