Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -r6a348c6ca6ace52afa68d680422c2714251cf84e -r7fe065949ae95d4151a6075ff2522a707b42784c
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 6a348c6ca6ace52afa68d680422c2714251cf84e)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 7fe065949ae95d4151a6075ff2522a707b42784c)
@@ -43,8 +43,7 @@
 
 #define NO_HEPARIN_TYPE_SET                     0xFFFFFFFF              ///< UI will send this value for Heparin type if Heparin not used
 #define INSTIT_CHEM_DISINFECT_ENABLE_RANGE      1                       ///< Institutional record chemical disinfect enable/disable allowable range
-#define INSTIT_MAX_RO_REJECTION_RATIO_MIN       0.0F                    ///< Institutional record max RO rejection ratio minimum
-#define INSTIT_MAX_RO_REJECTION_RATIO_MAX       1.0F                    ///< Institutional record max RO rejection ratio maximum
+#define INSTIT_MIN_RO_REJECTION_RATIO_MAX_PCT   99                      ///< Institutional record min RO rejection ratio maximum in percent.
 #define INSTIT_MAX_INLET_WATER_COND_ALARM_USPCM 300.0F                  ///< Institutional record max inlet water conductivity alarm in uS/cm.
 
 /// Record for range and default of treatment parameters.
@@ -1029,8 +1028,8 @@
                 ( nvInstRcrd->maxHeparinBolusVolumeML          <= TREAT_PARAMS_PROPERTIES[ TREATMENT_PARAM_HEPARIN_BOLUS_VOLUME ].max.sFlt )      ? TRUE : FALSE );
     result &= ( ( nvInstRcrd->minHeparinBolusVolumeML          <= nvInstRcrd->maxHeparinBolusVolumeML )                                           ? TRUE : FALSE );
     result &= ( ( nvInstRcrd->enableChemicalDisinfect          <= INSTIT_CHEM_DISINFECT_ENABLE_RANGE )                                            ? TRUE : FALSE );
-    result &= ( ( nvInstRcrd->maxRORejectionRatio              >= INSTIT_MAX_RO_REJECTION_RATIO_MIN )                                             &&
-                ( nvInstRcrd->maxRORejectionRatio              <= INSTIT_MAX_RO_REJECTION_RATIO_MAX )                                             ? TRUE : FALSE );
+    // NOTE: min RO rejection ratio is not needed to be >= 0 because it is a U32
+    result &= ( ( nvInstRcrd->minRORejectionRatioPCT           <= INSTIT_MIN_RO_REJECTION_RATIO_MAX_PCT )                                         ? TRUE : FALSE );
     result &= ( ( nvInstRcrd->minInletWaterCondAlarmLimitUSPCM >= 0.0F )                                                                          &&
                 ( nvInstRcrd->minInletWaterCondAlarmLimitUSPCM <= INSTIT_MAX_INLET_WATER_COND_ALARM_USPCM )                                       ? TRUE : FALSE );
 
Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r6a348c6ca6ace52afa68d680422c2714251cf84e -r7fe065949ae95d4151a6075ff2522a707b42784c
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 6a348c6ca6ace52afa68d680422c2714251cf84e)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 7fe065949ae95d4151a6075ff2522a707b42784c)
@@ -93,7 +93,7 @@
     F32 minHeparinBolusVolumeML;                            ///< Min heparin bolus volume in mL.
     F32 maxHeparinBolusVolumeML;                            ///< Max heparin bolus volume in mL.
     U32 enableChemicalDisinfect;                            ///< Enable/disable chemical disinfect.
-    F32 maxRORejectionRatio;                                ///< Max RO rejection ratio.
+    U32 minRORejectionRatioPCT;                             ///< Min RO rejection ratio in percent.
     F32 minInletWaterCondAlarmLimitUSPCM;                   ///< Min inlet water conductivity alarm limit in uS/cm.
 } HD_INSTITUTIONAL_LOCAL_RECORD_T;
 
@@ -3776,8 +3776,8 @@
         MESSAGE_T msg;
         DG_INSTITUTIONAL_VALUES_T dgInstitValues;
 
-        dgInstitValues.maxRORejectionRatio              = getMaxRORejectionRatioInInstitRecord();
-        dgInstitValues.minInletWaterCondAlarmLimitUSPCM = getMinInletWaterConductivityLimitInstitRecord();
+        dgInstitValues.minRORejectionRatioPCT           = getMinRORejectionRatioInInstitRecordPCT();
+        dgInstitValues.minInletWaterCondAlarmLimitUSPCM = getMinInletWaterConductivityLimitInstitRecordUSPCM();
 
         // Create a message record
         blankMessage( &msg );