Index: firmware/App/Modes/ModeGenDialysate.h
===================================================================
diff -u -rc51c9d66062c27c588006850550b412ea7dd5144 -r89cf53e72625123054b11897c2e0a8359d82b7ce
--- firmware/App/Modes/ModeGenDialysate.h	(.../ModeGenDialysate.h)	(revision c51c9d66062c27c588006850550b412ea7dd5144)
+++ firmware/App/Modes/ModeGenDialysate.h	(.../ModeGenDialysate.h)	(revision 89cf53e72625123054b11897c2e0a8359d82b7ce)
@@ -33,7 +33,7 @@
 
 #define FRESH_DIAL_PUMP_INITIAL_RPM             2500                                        ///< Nominal RPM target for fresh dialysate pump to maintain required pressure.
 #define SPENT_DIAL_PUMP_INITIAL_RPM             2300                                        ///< Nominal RPM target for spent dialysate pump to maintain required pressure.
-#define SPENT_DIAL_PUMP_FILL_RPM                1500                                        ///< Nominal RPM target for spent chamber fill operations.
+#define SPENT_DIAL_PUMP_FILL_RPM                400                                        ///< Nominal RPM target for spent chamber fill operations.
 
 /// Generate dialysate mode data structure
 typedef struct