Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -re7fe0454b5b2d39009dc784dc8c156856df8bc86 -rb6d20d9e5c704a9f7ebceea9bb12731dac61fc2a
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision e7fe0454b5b2d39009dc784dc8c156856df8bc86)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision b6d20d9e5c704a9f7ebceea9bb12731dac61fc2a)
@@ -36,7 +36,7 @@
 #define CONCENTRATE_PUMP_REVERSE_DIR                        0x0                                                 ///< Concentrate pump reverse direction configuration.
 
 #define CONCENTRATE_PUMP_SPEED_INCREMENT                    2.0F                                                ///< Speed increase (mL/min) when controlling concentrate pump to target step speed.
-#define CONCENTRATE_PUMP_MIN_SPEED                          3.0F                                                ///< Minimum speed for concentrate pump in mL per min.
+#define CONCENTRATE_PUMP_MIN_SPEED                          0.1F                                                ///< Minimum speed for concentrate pump in mL per min.
 #define CONCENTRATE_PUMP_SPD_OUT_OF_RANGE_TOL_WHEN_ON_PCT   0.02F                                               ///< Concentrate pump speed out of range tolerance when on in percentage.
 #define CONCENTRATE_PUMP_SPD_OUT_OF_RANGE_TOL_WHEN_SLOW_MLPM 1.0F                                               ///< Concentrate pump speed out of range tolerance when slow in mL/min.
 #define CONCENTRATE_PUMP_LOW_SPEED_THRESHOLD_MLPM           10.0F                                               ///< Concentrate pump low speed threshold in mL/min.
@@ -115,6 +115,14 @@
     BOOL isConcPumpParkInProgress;                                                                              ///< Concentrate pump park progress boolean flag (T/F).
 } CONCENTRATE_PUMP_T;
 
+/// Payload record structure for concentrate pump start/stop request
+typedef struct
+{
+    U32 pumpID;                                                                                                 ///< Concentrate pump ID (0:Acid ,1:Bicarb)
+    U32 startStop;                                                                                              ///< Concentrate pump start:1,stop :0.
+    F32 speed;                                                                                                  ///< Speed range from 0.1 ml/min to 48.0 ml/min.
+} CONC_PUMP_START_STOP_CMD_PAYLOAD_T;
+
 // ********** private data **********
 
 static U32 concentratePumpMonitorTimerCounter;                                                                  ///< Timer counter to perform monitor on concentrate pump.
@@ -459,8 +467,8 @@
         }
 
         /*
-         * If 3 <= speed <= 48 set it
-         * If speed < 3 set to 0
+         * If 0.1 <= speed <= 48 set it
+         * If speed < 0.1 set to 0
          * else speed > 48 set to 48
          */
         if ( ( CONCENTRATE_PUMP_MIN_SPEED <= targetSpeed_ml_min ) && ( targetSpeed_ml_min <= CONCENTRATE_PUMP_MAX_SPEED ) )
@@ -1140,6 +1148,54 @@
 
 /*********************************************************************//**
  * @brief
+ * The testConcentratePumpStartStopOverride function starts a given concentrate pump
+ * at mentioned speed/flowrate ( ml/min) or stops the concentrate pump.
+ * @details \b Inputs: tester logged in
+ * @details \b Outputs: concentratePumps[]
+ * @param message set message from Dialin which includes the concentrate pump to set
+ * and the state to set the concentratet pump to.
+ * @return TRUE if set request is successful, FALSE if not
+ *************************************************************************/
+BOOL testConcentratePumpStartStopOverride( MESSAGE_T *message )
+{
+    BOOL result = FALSE;
+
+    // Verify tester has logged in with TD
+    if ( TRUE == isTestingActivated() )
+    {
+        // Verify payload length is valid
+        if ( sizeof( CONC_PUMP_START_STOP_CMD_PAYLOAD_T ) == message->hdr.payloadLen )
+        {
+            CONC_PUMP_START_STOP_CMD_PAYLOAD_T payload;
+
+            memcpy( &payload, message->payload, sizeof(CONC_PUMP_START_STOP_CMD_PAYLOAD_T) );
+
+            if ( (CONCENTRATE_PUMPS_T)payload.pumpID < NUM_OF_CONCENTRATE_PUMPS )
+            {
+                // Handle start command
+                if ( ( TRUE == payload.startStop ) &&
+                      ( ( payload.speed >= CONCENTRATE_PUMP_MIN_SPEED ) && ( payload.speed <= CONCENTRATE_PUMP_MAX_SPEED ) ) )
+                {
+                    setConcentratePumpTargetSpeed( (CONCENTRATE_PUMPS_T)payload.pumpID, payload.speed );
+                    requestConcentratePumpOn ( (CONCENTRATE_PUMPS_T)payload.pumpID );
+                    result = TRUE;
+                }
+
+                //Handle stop command
+                if ( FALSE == payload.startStop )
+                {
+                    stopConcentratePump( (CONCENTRATE_PUMPS_T)payload.pumpID );
+                    result = TRUE;
+                }
+            }
+        }
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
  * The testConcentratePumpParkRequestOverride function overrides the given pump
  * to park request.
  * @details \b Inputs: concentratePumps