Automatic drain back. One bulb illumination. The Butler 30 was introduced around 1930 and was still being made in 1934. Butler called it a speedy pump because it could lift 10 gallons in 20 seconds with 15 easy strokes. It had heavy seamless brass tube cylinders.
Pistons are of cast and pressed steel with guide rings and leather gasket.
Bronze rocking shaft rides in ball bearings. Double cylinder pump unit caarried by pump frame. Automatic drain back. One bulb illumination. All Rights Reserved.