Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -rfba69244d94307e50fefaa1e88bcbb979584461e -re42bc54b5c3ff134d9f4526034e3c522a64f0cdf
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision fba69244d94307e50fefaa1e88bcbb979584461e)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision e42bc54b5c3ff134d9f4526034e3c522a64f0cdf)
@@ -43,6 +43,8 @@
 
 #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_RO_REJECTION_RATIO_MIN           0.0F                    ///< Institutional record RO rejection ratio minimum
+#define INSTIT_RO_REJECTION_RATIO_MAX           1.0F                    ///< Institutional record RO rejection ratio maximum
 
 /// Record for range and default of treatment parameters.
 typedef struct
@@ -1026,6 +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->roRejectionRatio                 >= INSTIT_RO_REJECTION_RATIO_MIN )                                                 &&
+                ( nvInstRcrd->roRejectionRatio                 <= INSTIT_RO_REJECTION_RATIO_MAX )                                                 ? TRUE : FALSE );
 
     return result;
 }