Assured Automation WM-PC Series Plastic Water Meter 3/4" with Pulse Output Flow Rate 1-20 GPM (will measure as low as 0.25gpm), BPA Free Totalizer Measuring in Gallons, +/- 1.5% accurate in flow range NSF 61 Certified, NPT Threaded Durable and Accurate, NSF 61 Certified Couplings Included, Horizontal Installation