Index: firmware/App/DDCommon.h
===================================================================
diff -u -r53bac040ed66a54ebfc0262f4a3b41daaa0703bf -rebc66999208b337d8cdef22c07f73d47bb0720a4
--- firmware/App/DDCommon.h	(.../DDCommon.h)	(revision 53bac040ed66a54ebfc0262f4a3b41daaa0703bf)
+++ firmware/App/DDCommon.h	(.../DDCommon.h)	(revision ebc66999208b337d8cdef22c07f73d47bb0720a4)
@@ -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