The reservoir is the basic element of each multi-role propulsion unit: storage of working fluid, heat removal, extraction of air, deposition of impurities. It can also be used for carrying propulsion and control devices. It is made of steel sheet. Equipped with an inlet filter with a vent, a max level indicator and an oil drain plug, a cleaning hatch closure and a manual pump hatch cap. The tank cover is intended for removal for the purpose of processing and mounting of the supporting devices (pump unit or control device) and is secured with screws.

