Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -r6225363b7538fd419d20fba31a050f546c682703 -r3fa3bf8d5bf51649dd00756484344daa7dbf6e73
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 6225363b7538fd419d20fba31a050f546c682703)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 3fa3bf8d5bf51649dd00756484344daa7dbf6e73)
@@ -93,6 +93,7 @@
 
 // R1 to R2 & R2 to R1 heat disinfect circulation
 #define HEAT_DISINFECT_TARGET_RO_FLOW_LPM          1.3F                                                        ///< Heat disinfect target RO flow rate in L/min.
+#define HEAT_DISINFECT_TARGET_RO_FLOW_TRANSFER_LPM 0.8F                                                        ///< Heat disinfect target RO flow rate in L/min when transferring between reservoirs.
 #define HEAT_DISINFECT_MAX_RO_PRESSURE_PSI         30                                                          ///< Heat disinfect maximum RO pressure in psi.
 #define HEAT_DISINFECT_TARGET_DRAIN_PRES_PSI       12.0F                                                       ///< Heat disinfect target drain outlet pressure in psi.
 #define HEAT_DISINFECT_TIME_MS                     ( 10 * SEC_PER_MIN * MS_PER_SECOND )                        ///< Heat disinfect time for each section in milliseconds.
@@ -1132,6 +1133,11 @@
             setValveState( VRD2, VALVE_STATE_CLOSED );
             setValveState( VRI, VALVE_STATE_R1_C_TO_NO );
             setValveState( VRF, VALVE_STATE_R2_C_TO_NO );
+
+            // Set the RO flow to maximum pressure of 30psi since it is the maximum pressure on the RO filter
+            // at inlet temperature > 45 C
+            setROPumpTargetFlowRateLPM( HEAT_DISINFECT_TARGET_RO_FLOW_TRANSFER_LPM, HEAT_DISINFECT_MAX_RO_PRESSURE_PSI );
+
             // 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;
@@ -1186,6 +1192,10 @@
             R1HeatDisinfectVol = getLoadCellLargeFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY );
             R2HeatDisinfectVol = getLoadCellLargeFilteredWeight( LOAD_CELL_RESERVOIR_2_PRIMARY );
 
+            // Set the RO flow to maximum pressure of 30psi since it is the maximum pressure on the RO filter
+            // at inlet temperature > 45 C
+            setROPumpTargetFlowRateLPM( HEAT_DISINFECT_TARGET_RO_FLOW_LPM, HEAT_DISINFECT_MAX_RO_PRESSURE_PSI );
+
             state = DG_HEAT_DISINFECT_STATE_DISINFECT_R2_TO_R1;
         }
         else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status )
@@ -1828,6 +1838,7 @@
     return state;
 }
 
+
 /*********************************************************************//**
  * @brief
  * The handleHeatDisinfectCompleteState function handles the