Index: firmware/App/Controllers/DialInFlow.c
===================================================================
diff -u -rb71aca78afda3d5a827530a767935eb4a7de976a -r5a03bc5bd579bf84301d26d7b062c3cadd2068c5
--- firmware/App/Controllers/DialInFlow.c	(.../DialInFlow.c)	(revision b71aca78afda3d5a827530a767935eb4a7de976a)
+++ firmware/App/Controllers/DialInFlow.c	(.../DialInFlow.c)	(revision 5a03bc5bd579bf84301d26d7b062c3cadd2068c5)
@@ -113,7 +113,6 @@
 /// Conversion from pump motor speed to PWM duty cycle.
 #define DIP_MOTOR_SPEED_RPM_TO_PWM(rpm)      ( ( rpm / 4000.0F ) + 0.1 )
 // Macro converts PWM to estimate flow rate needed to achieve it.
-//#define DIP_ML_PER_MIN_FROM_PWM(pwm)         ( (( pwm - DIP_PWM_ZERO_OFFSET) * 684.73F ) + 49.121F )
 #define DIP_ML_PER_MIN_FROM_PWM(pwm)         ( (pwm) - DIP_PWM_ZERO_OFFSET ) / DIP_ML_PER_MIN_TO_PUMP_RPM_FACTOR / DIP_GEAR_RATIO / DIP_MOTOR_RPM_TO_PWM_DC_FACTOR