Flojet G57 air operated diaphragm pump 
Model G575205A
Fluid ports in/out: stepped hose tails for 10 mm or 13 mm (3/8 or 1/2 inch) ID hose
Air inlet port: 6 mm (1/4 inch) brass hose tail
Performance:
26.5 lpm (7 gpm)
6.9 bar (100 psi) 
1.4 to 6.9 bar (20 to 100 psi) air supply pressure range
Self priming to 4.5 m (15 ft) 
Liquid temperature:
48.9 degrees C maximum
4.4 degrees C minimum
Materials:
Glass filled Polypropylene body
Santoprene diaphragm