Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -rab7dfc361e5ee347141842b317f1fc2f16e4e3f3 -re5ad74ca84ead6c613dfcca396388ae5f6b77442
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision ab7dfc361e5ee347141842b317f1fc2f16e4e3f3)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision e5ad74ca84ead6c613dfcca396388ae5f6b77442)
@@ -43,7 +43,7 @@
 #define TARGET_RO_PRESSURE_PSI                          130                                         ///< Target pressure for RO pump.
 #define TARGET_RO_FLOW_RATE_L                           0.8                                         ///< Target flow rate for RO pump.
 
-#define DIALYSATE_FILL_TIME_OUT                         ( 5 * SEC_PER_MIN * MS_PER_SECOND )         ///< Time out period when reservoir is not filled with correct dialysate.
+#define DIALYSATE_FILL_TIME_OUT                         ( 8 * SEC_PER_MIN * MS_PER_SECOND )         ///< Time out period when reservoir is not filled with correct dialysate.
 #define EMPTY_BOTTLE_DETECT_PERSISTENT_PERIOD_MS        ( 5 * MS_PER_SECOND )                       ///< Persistent period for empty bottle detect.
 ///< Persistent time interval for concentrate pumps prime.
 #define CONCENTRATE_PUMP_PRIME_INTERVAL                 ( 3 * MS_PER_SECOND / TASK_GENERAL_INTERVAL )