Original BEKO BEKOMAT 31U Condensate Drain — Part No. 4024381 Original BEKO BEKOMAT 31U electronically level-controlled condensate drain, part number 4024381. 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