3-Wheel Mechanical, 3/4" Meter, 5-20 GPM The 807C Mechanical flow meter has a large easy to read display, flow ports can be positioned vertically or horizontally, UL/cUL listed, handles fluid of any viscosity, rated for Gasoline, Diesel, Kerosene, mineral spirits, Stoddard solvents and heptane. . Fill-Rite meters provide precision and durability in a cost-effective design. The 807C is a 3 wheel mechanical meter designed for transfer pumps with a flow rate of 5 to 20 GPM. this meter has a 3/4 in. inlet and outlet.. +/- 1% accuracy. UL/cUL, CE listed. 5-20 GPM. 50 PSI. 3/4 in. inlet, 3/4 in. outlet. Large easy to read display. NPT threads 807C