Index: firmware/App/Modes/BalancingChamber.h
===================================================================
diff -u -r6679a2cd813b21a8cb4c58b3eeb721e0eef9a10b -rbf55b31e342873e3d6047b09749628f5fe275d8d
--- firmware/App/Modes/BalancingChamber.h	(.../BalancingChamber.h)	(revision 6679a2cd813b21a8cb4c58b3eeb721e0eef9a10b)
+++ firmware/App/Modes/BalancingChamber.h	(.../BalancingChamber.h)	(revision bf55b31e342873e3d6047b09749628f5fe275d8d)
@@ -31,6 +31,11 @@
 
 // ********** public definitions **********
 
+#define FRESH_DIAL_PRESSURE_MIN_PSIG                21.0F                                       ///< Minimum fresh dialysate pressure (PDf) limit for balancing chamber fill operations.
+#define FRESH_DIAL_PRESSURE_MAX_PSIG                26.0F                                       ///< Maximum fresh dialysate pressure (PDf) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MIN_PSIG                28.0F                                       ///< Minimum spent dialysate pressure (PDs) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MAX_PSIG                30.0F                                       ///< Maximum spent dialysate pressure (PDs) limit for balancing chamber fill operations.
+
 /// balancing chamber data structure
 typedef struct
 {