Original BEKO BEKOMAT 13 electronically level-controlled condensate drain, part number 2000021. This is the drain unit itself — the industry standard for reliable condensate drainage without compressed air loss. How It Works The BEKOMAT® is an electronically level-controlled condensate drain used for draining off condensate in compressed air systems. The condensate formed is collected inside the BEKOMAT and the filling level is monitored by an integrated capacitive sensor.