The pumps have been used for testing as part of hydraulic engineering and water management teaching for 100 years.

They include two double-entry pumps from 1913 and a single-stage pump from 1916. As well as overhauling the pumps, the service specialists from KSB’s Pegnitz site fitted new valves and replaced old cast pipes with stainless steel piping. Since the old pumps do not feature flanges standardised to DIN ‒ the first DIN standards were released in March 1918 ‒ the piping manufacturer had to transfer the hole patterns onto the loose plate flanges of the new pipes.