Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -r0bf1c0824844ed4c227eef0323238daedf505dc7 -rd110e0ed1d67e15d968a64da61c2535965ed1321
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 0bf1c0824844ed4c227eef0323238daedf505dc7)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision d110e0ed1d67e15d968a64da61c2535965ed1321)
@@ -1156,6 +1156,10 @@
                 handleSetConcentratePumpTargetSpeed( message );
                 break;
 
+            case MSG_ID_CONCENTRATE_PUMP_STATE_CHANGE_REQUEST:
+                handleConcentratePumpStateChangeRequest( message );
+                break;
+
             default:
                 // TODO - unrecognized message ID received - ignore
                 break;
Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r0bf1c0824844ed4c227eef0323238daedf505dc7 -rd110e0ed1d67e15d968a64da61c2535965ed1321
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 0bf1c0824844ed4c227eef0323238daedf505dc7)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision d110e0ed1d67e15d968a64da61c2535965ed1321)
@@ -1959,4 +1959,38 @@
     sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
 }
 
+/*********************************************************************//**
+ * @brief
+ * The handleConcentratePumpStateChangeRequest function handles a request to
+ * change the concentrate pumps' state.
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handleConcentratePumpStateChangeRequest( MESSAGE_T *message )
+{
+    BOOL result = FALSE;
+
+    // verify payload length
+    if ( ( sizeof( BOOL ) == message->hdr.payloadLen ) && ( TRUE == isTestingActivated() ) )
+    {
+        result = TRUE;
+
+        BOOL payload;
+        memcpy( &payload, message->payload, sizeof( BOOL ) );
+        if ( TRUE == payload )
+        {
+            requestConcentratePumpOn();
+        }
+        else
+        {
+            requestConcentratePumpOff();
+        }
+    }
+
+    // respond to request
+    sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
+}
+
 /**@}*/
Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -r0bf1c0824844ed4c227eef0323238daedf505dc7 -rd110e0ed1d67e15d968a64da61c2535965ed1321
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 0bf1c0824844ed4c227eef0323238daedf505dc7)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision d110e0ed1d67e15d968a64da61c2535965ed1321)
@@ -206,6 +206,9 @@
 // MSG_ID_CONCENTRATE_PUMP_TARGET_SPEED_OVERRIDE
 void handleSetConcentratePumpTargetSpeed( MESSAGE_T *message );
 
+// MSG_ID_CONCENTRATE_PUMP_STATE_CHANGE_REQUEST
+void handleConcentratePumpStateChangeRequest( MESSAGE_T *message );
+
 /**@}*/
 
 #endif