BACKGROUND

A printer may contain an onboard reservoir to store printing agent within the printer. The reservoir may supply a printing agent delivery system, such as an inkjet print head, with printing agent. The reservoir may be filled with printing agent by connecting a printing agent supply vessel to the printer and pumping the printing agent into the reservoir.

At certain times, such as upon completion of a service contract or at the end of life of the printer, excess printing agent left in the reservoir may be recovered from the printer. Printing agent may be recovered from the printer by connecting a printing agent recovery vessel to the printer and pumping the printing agent into the recovery vessel.

