Index: firmware/App/Modes/BloodPrime.c
===================================================================
diff -u -rc65ad0538ff99c3e13d7d7866ac15e38a1ef6002 -r8466e63f95f65a3ffb18c3af85ac99328e41167b
--- firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision c65ad0538ff99c3e13d7d7866ac15e38a1ef6002)
+++ firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 8466e63f95f65a3ffb18c3af85ac99328e41167b)
@@ -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