Index: firmware/App/DDCommon.h
===================================================================
diff -u -r4c603a22956757874a432a7f388193f567a32ea3 -r081b2525e3a650671d770513eb841057d88ea505
--- firmware/App/DDCommon.h	(.../DDCommon.h)	(revision 4c603a22956757874a432a7f388193f567a32ea3)
+++ firmware/App/DDCommon.h	(.../DDCommon.h)	(revision 081b2525e3a650671d770513eb841057d88ea505)
@@ -66,7 +66,10 @@
 //Uncomment below to disable the conductivity sensor alarms
 #define __CONDUCTIVITY_SENSOR_ALARMS_DISABLED__  1
 
+//Uncommnet below to enable the D65 valves opening during balancincg chamber fill
+//#define __D65_OPENING_DISABLED__  1
 
+
     #include <stdio.h>
     #include <strings.h>
 #endif