Drain Valve Service module for Bekomat 31 no-loss drain valve. This is an OEM drain manufactured by BEKO.It consists of all parts required to service a Bekomat series 31 drain valve.  Included is the main service unit, replacement cartridge o-ring and a new sealing mat. This drain is commonly found inside refrigerated air dryers, on the bottom of air filters and air receivers.

If your unit is continuously venting, you need to replace the service module.