Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -r8a89e041755b26fad2530e1b8ad2cfeed1937b0a -r3727453ce70f85af78902e3726073cea37969c8d
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 8a89e041755b26fad2530e1b8ad2cfeed1937b0a)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 3727453ce70f85af78902e3726073cea37969c8d)
@@ -94,7 +94,7 @@
 
 // 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 0.5F                                                        ///< Heat disinfect target RO flow rate in L/min when transferring between reservoirs.
+#define HEAT_DISINFECT_TARGET_RO_FLOW_TRANSFER_LPM 0.4F                                                        ///< 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_START_TEMP_TIMEOUT_MS       ( 4 * MIN_PER_HOUR * SEC_PER_MIN * MS_PER_SECOND )          ///< Heat disinfect reaching to minimum temperature timeout in milliseconds.
 #define RSRVRS_TARGET_VOL_OUT_TIMEOUT_MS           ( 10 * MS_PER_SECOND )                                      ///< Reservoirs 1 & 2 maximum volume out of range timeout during heat disinfect.