Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -r067fc27c9f9a87c7388d0f1438a7cecd7418170b -r973d6d105b9a41869bd5b8403f3aa3f2c60336c1
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 067fc27c9f9a87c7388d0f1438a7cecd7418170b)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 973d6d105b9a41869bd5b8403f3aa3f2c60336c1)
@@ -49,7 +49,7 @@
 #define PRE_TREATMENT_NORMAL_FILL_TARGET_TEMP_C       ( 37.0F + 2.0F )  ///< Pre treatment normal fill target temperature in C.
 
 #define PRE_TREATMENT_MIN_FILL_RESERVOIR_VOLUME_ML    500               ///< Fill reservoir to this volume minimum to prep volume during development.
-#define PRE_TREATMENT_FLUSH_RESERVOIR_VOLUME_ML       500               ///< Fill reservoir to this volume (in mL) to flush filter and lines.
+#define PRE_TREATMENT_FLUSH_RESERVOIR_VOLUME_ML       400               ///< Fill reservoir to this volume (in mL) to flush filter and lines.
 #define PRE_TREATMENT_FILL_RESERVOIR_ONE_VOLUME_ML    1300              ///< Fill reservoir one to this volume (in mL) during pre-treatment mode.
 #define PRE_TREATMENT_FILL_RESERVOIR_TWO_VOLUME_ML    600               ///< Fill reservoir two to this volume (in mL) during pre-treatment mode.
 #define PRE_TREATMENT_FULL_RESERVOIR_VOLUME_ML        1500              ///< Fill reservoir to this volume minimum to prep volume during development.