Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -rbcd5068a8afd80703b3dbeb450623641afe7fe7f -refba6ee17f35ecad287d33a15f795e446a5574a8
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision bcd5068a8afd80703b3dbeb450623641afe7fe7f)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision efba6ee17f35ecad287d33a15f795e446a5574a8)
@@ -80,7 +80,7 @@
 
 // 2m long tubing to cap = 19.5 mL (acid line) + 7.92 mL/m * 2 m (tubing to cap) + 20.82 mL (straw) = 56.15 mL
 // Prime time in seconds = ( 56.15 mL / 48 mL/min ) x 60 second/min + 25 seconds margin time = 95 seconds.
-#define PRIME_CONCENTRATE_LINES_TIME_OUT_MS             ( 95 * MS_PER_SECOND )                               ///< Time required to prime the concentrate lines.
+#define PRIME_CONCENTRATE_LINES_TIME_OUT_MS             ( 60 * MS_PER_SECOND )                               ///< Time required to prime the concentrate lines.
 #define FLUSH_BUBBLES_PUMP_TIME_OUT_MS                  ( 2  * MS_PER_SECOND )                               ///< RO pump on during flush bubble interval in ms.
 #define DIALYSATE_TEMPERATURE_TOLERANCE_C               2.0F                                                 ///< Dialysate temperature tolerance in degree C.
 #define DATA_PUBLISH_COUNTER_START_COUNT                63                                                   ///< Data publish counter start count.