Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -r77cf960846ef93d74fec68572fa596bf1f24bdc3 -r283dc004e90bef503a5ba6f2c76712322818c02a
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 77cf960846ef93d74fec68572fa596bf1f24bdc3)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 283dc004e90bef503a5ba6f2c76712322818c02a)
@@ -1130,6 +1130,12 @@
             stateTimer            = getMSTimerCount();
             rsrvrsVolMonitorTimer = getMSTimerCount();
             state                 = DG_HEAT_DISINFECT_STATE_DISINFECT_R1_TO_R2;
+
+            // Filled up the reservoirs, start the concentrate pumps to prevent the concentrate tubing from swallowing and potential rupture
+            setConcentratePumpTargetSpeed( CONCENTRATEPUMPS_CP1_ACID, ACID_PUMP_SPEED_ML_PER_MIN );
+            setConcentratePumpTargetSpeed( CONCENTRATEPUMPS_CP2_BICARB, BICARB_PUMP_SPEED_ML_PER_MIN );
+            requestConcentratePumpOn( CONCENTRATEPUMPS_CP1_ACID );
+            requestConcentratePumpOn( CONCENTRATEPUMPS_CP2_BICARB );
         }
         else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status )
         {
@@ -1192,9 +1198,6 @@
             break;
 
         case HEAT_DISINFECT_COMPLETE:
-            requestConcentratePumpOff( CONCENTRATEPUMPS_CP1_ACID, NO_PARK_CONC_PUMPS );
-            requestConcentratePumpOff( CONCENTRATEPUMPS_CP2_BICARB, NO_PARK_CONC_PUMPS );
-
             // Although there is fluid in both reservoirs, but they are set to empty
             // to begin the transition of hot water from R1 to R2.
             rsrvr2Status                            = DG_RESERVOIR_BELOW_TARGET;