Index: firmware/App/Modes/BloodPrime.c
===================================================================
diff -u -rea0047d0cb48b899475cf519e7e4997d96f5e538 -r44a100f8e5210a02c23b8fcc4527d8e96d577381
--- firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision ea0047d0cb48b899475cf519e7e4997d96f5e538)
+++ firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 44a100f8e5210a02c23b8fcc4527d8e96d577381)
@@ -39,10 +39,13 @@
 // TODO - get from Systems when available
 #define TARGET_BLOOD_PRIME_VOLUME_ML               300.0                    ///< Target blood prime volume to prime the blood side circuit (in mL).
 #define MIN_RAMP_TIME_SEC                          60                       ///< Minimum ramp time for blood prime (in seconds).
+
+#ifndef DISABLE_PUMP_FLOW_CHECKS
 /// Maximum blood prime volume measured by independent means (as % of target).
 static const F32 MAX_BLOOD_PRIME_SAFETY_VOLUME_ML = ( TARGET_BLOOD_PRIME_VOLUME_ML * 1.2 );
 /// Minimum blood prime volume measured by independent means (as % of target).
 static const F32 MIN_BLOOD_PRIME_SAFETY_VOLUME_ML = ( TARGET_BLOOD_PRIME_VOLUME_ML * 0.8 );
+#endif
 
 /// Initial flow rate for blood pump when starting blood prime operation.
 #define BLOOD_PRIME_INIT_BP_FLOW_RATE_ML_MIN       100