Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -r0237b2fc49d60b6602bac35ce43831b37f294c81 -ra25c11a9beb66c7292a184e3bc02a1a5ded5ed8a
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 0237b2fc49d60b6602bac35ce43831b37f294c81)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision a25c11a9beb66c7292a184e3bc02a1a5ded5ed8a)
@@ -45,9 +45,15 @@
 
 #define DIP_PATIENT_CONNECTION_FLOW_RATE_ML_MIN         100             ///< Patient connection sub-mode dialysate inlet pump flow rate in mL/min.
 
+#ifndef SKIP_PRIMING
 #define PRE_TREATMENT_FLUSH_RESERVOIR_VOLUME_ML         500             ///< 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      700             ///< Fill reservoir two to this volume (in mL) during pre-treatment mode.
+#else
+#define PRE_TREATMENT_FLUSH_RESERVOIR_VOLUME_ML         FILL_RESERVOIR_TO_VOLUME_ML
+#define PRE_TREATMENT_FILL_RESERVOIR_ONE_VOLUME_ML      FILL_RESERVOIR_TO_VOLUME_ML
+#define PRE_TREATMENT_FILL_RESERVOIR_TWO_VOLUME_ML      FILL_RESERVOIR_TO_VOLUME_ML
+#endif
 
 #define PRIMARY_HEATER_TARGET_TEMP_OFFSET               2.0             ///< Primary heater target temperature offset from trimmer heater temperature.