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GPI A1 Series 1 in. NPT Commercial Grade Low Flow Nylon Meter - Gallons - John M. Ellsworth Co. Inc.
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GPI 01N31LM Nylon Turbine Water Flowmeter with Digital LCD Display, 10-100 LPM, 1-Inch FNPT Inlet/Outlet (113255-5): Amazon.com: Industrial & Scientific
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