The EPP pneumatic lift station constitutes a complete and fully automated installation. The operating principle of the EPP pneumatic lift station consists in a cyclical and alternate occurrence of two operating phases of the lift station: the filling phase and the pumping phase. In the filling phase, sewage flows to the vertical external pipe retention chamber; from there, it flows through the inflow well to the working chambers through open inlet valves. The outlet valve is open so that air could be released from the working chambers, while all the other valves remain closed. Once the working chambers have been filled with sewage, waste continues to accumulate in the inflow well and in the pipe retention chamber. Once the adequate level of sewage has been reached in the pipe retention chamber, the sewage pumping phase is switched on, which continues until the switching off level has been reached.

The pumping phase starts with the outlet valves being closed. The inlet elbow valve is closed under the influence of control air supplied to the working chamber by opening of the control valve. Once the inlet valve is closed, the working air valve is open, through which compressed air is pumped, as a result of which the elbow check valve is open that is located on the outlet from the working chambers, while sewage is forced out with compressed air from the working chamber and is forced into the pressure conduit. Pumping of sewage continues until the time set has elapsed or an adequate level in the working chamber has been reached. Then, the outlet valve is open and air that is inside the working chamber is decompressed in the suppressor, after which the biofilter is located.

After the completion of the compression phase, the system enters the filling phase. These cycles are repeated, and air is alternately forced into the working chambers until the level of sewage in the retention chamber has reached the minimum.