Index: firmware/App/Controllers/BalancingChamber.h
===================================================================
diff -u -r4237cbced773b985ff69a8c2af8287dbd5457f24 -ra08213c3d131203c21554d743c3ccb02575b70da
--- firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision 4237cbced773b985ff69a8c2af8287dbd5457f24)
+++ firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision a08213c3d131203c21554d743c3ccb02575b70da)
@@ -33,8 +33,8 @@
 
 #define FRESH_DIAL_PRESSURE_MIN_PSIG                23.0F              ///< Minimum fresh dialysate pressure (D18) limit for balancing chamber fill operations.
 #define FRESH_DIAL_PRESSURE_MAX_PSIG                27.0F              ///< Maximum fresh dialysate pressure (D18) limit for balancing chamber fill operations.
-#define SPENT_DIAL_PRESSURE_MIN_PSIG                33.0F              ///< Minimum spent dialysate pressure (D51) limit for balancing chamber fill operations.
-#define SPENT_DIAL_PRESSURE_MAX_PSIG                37.0F              ///< Maximum spent dialysate pressure (D51) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MIN_PSIG                21.0F              ///< Minimum spent dialysate pressure (D51) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MAX_PSIG                27.0F              ///< Maximum spent dialysate pressure (D51) limit for balancing chamber fill operations.
 #define BC_FRESH_FILL_PRESSURE_PSIG                 15.0F              ///< Fresh side pressure (drop) during balancing chamber switching, indicates fill has been started / in progress.
 #define BC_SPENT_FILL_PRESSURE_PSIG                 29.0F              ///< Spent side pressure (drop) during balancing chamber switching, indicates fill has been started / in progress.
 #define BAL_CHAMBER_FILL_VOLUME_ML                  30.0F              ///< Balancing chamber fill/drain volume per batch operation.
@@ -82,6 +82,8 @@
 BOOL testAcidDoseVolumeOverride( MESSAGE_T *message );                   // To override acid dosing volume
 BOOL testBicarbDoseVolumeOverride( MESSAGE_T *message );                 // To override bicarb dosing volume
 
+
+BOOL getBalancingChamberStatus(void);
 /**@}*/
 
 #endif