Thanks everyone. Found this on a google search, after I found the plate on the other side of the pump labeled "Handy Pump": Seems it was marketed as a general purpose, consumer grade pump.
Gorman-Rupp also began to diversify within the pump category in earnest in the 1960s. It launched new lines of submersible pumps for mining, centrifugal pumps and fiberglass pumping stations for municipal sewage systems, specialty pumps for moving home heating oil and aircraft fuel quickly and safely, as well as pumps for the consumer market (i.e., the "handy pump") and a backpack pump for firefighters. These technological developments and the new markets they opened helped triple Gorman-Rupp's sales for the second consecutive decade, from $7 million in 1959 to $21 million by 1969.