The 901C 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 901C meter is a 4 wheel mechanical meter designed for transfer pumps with a flow rate of 6 to 40 GPM. this meter has a 1 in. inlet and outlet. 6 to 40 GPM Meter Accuracy of 2% Gallon Register. 50 PSI UL/cUL listed. NPT threads.