Index: firmware/App/Services/PIControllers.h
===================================================================
diff -u -r1943944469d5a9f841f366ef9d8969c3072bd7ab -rfbc0a281b094ff309dcbf83db1878818a9b384f1
--- firmware/App/Services/PIControllers.h	(.../PIControllers.h)	(revision 1943944469d5a9f841f366ef9d8969c3072bd7ab)
+++ firmware/App/Services/PIControllers.h	(.../PIControllers.h)	(revision fbc0a281b094ff309dcbf83db1878818a9b384f1)
@@ -34,6 +34,7 @@
 typedef enum ControllerList
 {
     PI_CONTROLLER_ID_RO_PUMP = 0,                   ///< RO Pump controller
+    PI_CONTROLLER_ID_DRAIN_PUMP,                    ///< Drain Pump controller
     PI_CONTROLLER_ID_PRIMARY_HEATER,                ///< Primary Heater controller
     PI_CONTROLLER_ID_TRIMMER_HEATER,                ///< Trimmer Heater controller
     I_CONTROLLER_ID_RO_PUMP_RAMP_UP,                ///< RO Pump controller during ramp up time.