Flojet G57 Series Air Pump - Santoprene Model# G575215D Flow Rate - Up to 5.0 gpm (18.9 lpm) Max Air Supply Pressure - 20 to 100 psi (1.4 to 6.9 bar ) Temperature Range - 40 - 120 °F (4.4 - 48.9 °C) Self Priming - Up to 15ft (4.5m) Ports - Air Inlet/Outlet 1/4” (6.3 mm) Hose Barb, Liquid Inlet/Outlet 1/2" (12.7mm) Hose Barb FLOJET Industrial G57 and G57C Pumps are designed for general commercial and industrial applications. These pumps are constructed from a selection of materials for handling a broad range of chemicals. Allowed Fluids for Santoprene Materials: Potable Water Acids Alkaline Soaps Alcohols Ketones