Index: firmware/App/Controllers/ROPump.c
===================================================================
diff -u -r70f88b1f2610e5d03453f27c94fb2413d995ae40 -re53dfe303b1d166d9ab0a53a6931c7255dde9c4d
--- firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision 70f88b1f2610e5d03453f27c94fb2413d995ae40)
+++ firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision e53dfe303b1d166d9ab0a53a6931c7255dde9c4d)
@@ -221,7 +221,7 @@
     BOOL result = FALSE;
 
     // First of all, the flow rate must be in range
-    if ( ( roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM ) )
+    if ( ( (roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM )) || 0 <= roFlowRate )
     {
         // Then the max pressure that we are allowed to reach must be in range
         if ( ( maxPressure >= MIN_ALLOWED_PRESSURE_PSI ) && ( maxPressure <= MAX_ALLOWED_PRESSURE_PSI ) )
@@ -271,7 +271,7 @@
     BOOL result = FALSE;
 
     // First of all, the flow rate must be in range
-    if ( ( roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM ) )
+    if ( (( roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM )) || 0 <= roFlowRate )
     {
         // Then the max pressure that we are allowed to reach must be in range
         if ( ( maxPressure >= MIN_ALLOWED_PRESSURE_PSI ) && ( maxPressure <= MAX_ALLOWED_PRESSURE_PSI ) )
@@ -923,7 +923,7 @@
     if ( TRUE == isTestingActivated() )
     {
         // The flow rate and pressure must be in range
-        if ( ( flow <= MAX_RO_FLOWRATE_LPM ) && ( flow >= MIN_RO_FLOWRATE_LPM ) )
+        if ( (( flow <= MAX_RO_FLOWRATE_LPM ) && ( flow >= MIN_RO_FLOWRATE_LPM ) ) || 0 <= flow )
         {
             result = setROPumpTargetFlowRateLPM( flow, MAX_ALLOWED_PRESSURE_PSI );
         }