The operational reliability of steam turbine condensing units largely depends on the reliability of the main ejectors. Ejector failure usually leads to turbine shutdown due to a vacuum drop in the condenser. The main steam jet ejectors are made of two or three stages with intermediate coolers of the steam-air mixture. Most sudden failures of ejectors are associated with overfilling of coolers with condensate (drainage), the creation of high back pressure at the outlet of stage diffusers and a sharp increase in the pressure of the steam-air mixture at the ejector suction and then the steam pressure in the condenser. In this regard, the reliability of removing steam condensate from coolers affects the performance of the ejector as a whole. Schemes for removing steam condensate from ejectors can be divided into cascade and with separate outlet. The disadvantage of cascade schemes for removing steam condensate from multi-stage steam jet ejectors is the additional steam load of the lower stages from the incoming hot steam condensate from the upper stages. In addition, in cascade circuits it is necessary to install shut-off valves, which are the place of potential air suction, to switch between ejectors. Schemes with individual drainage have water seals of considerable height, sometimes exceeding the differences in elevation between the point of discharge into the condenser and the lower level of the workshop floor. For such drainage, a shaft is drilled in the workshop floor and a drainage well is organized. The disadvantage of this scheme is its practical non-repairability. Among the disadvantages of existing schemes of organizing drainage from a multi-stage steam-jet ejector it is the integration of drainage from different ejectors into one collector. Schemes for removing steam condensate from steam jet ejectors can be organized in different ways. The reliability of the operation of these circuits is determined by the ejector maintenance system.