Index: firmware/App/Controllers/BalancingChamber.h
===================================================================
diff -u -r573a26b2a0273a4983b1de1cbff5bed63e01dce0 -rb13fc4db3591da73c3c63e81a69be3f9d0de2c3f
--- firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision 573a26b2a0273a4983b1de1cbff5bed63e01dce0)
+++ firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision b13fc4db3591da73c3c63e81a69be3f9d0de2c3f)
@@ -33,9 +33,9 @@
 
 #define FRESH_DIAL_PRESSURE_MIN_PSIG                22.0F              ///< Minimum fresh dialysate pressure (D18) limit for balancing chamber fill operations.
 #define FRESH_DIAL_PRESSURE_MAX_PSIG                28.0F              ///< 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 BC_FRESH_FILL_PRESSURE_PSIG                 14.0F              ///< Fresh side pressure (drop) during balancing chamber switching, indicates fill has been started / in progress.
+#define SPENT_DIAL_PRESSURE_MIN_PSIG                30.0F              ///< Minimum spent dialysate pressure (D51) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MAX_PSIG                40.0F              ///< 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.