Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -rce3e0696642099164fa482c864509c67ce65579b -r5c1a2839872522daf6c69090afdb2bb2dff68080
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision ce3e0696642099164fa482c864509c67ce65579b)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 5c1a2839872522daf6c69090afdb2bb2dff68080)
@@ -393,11 +393,27 @@
  * @details Inputs: none
  * @details Outputs:
  * @param params payload record from treatment parameters message received from UI
- * @return TRUE if received treatment parameters are valid, FALSE if not
+ * @return TRUE if received UF volume parameter is valid, FALSE if not
  *************************************************************************/
-BOOL validateAndSetUFVolume( F32 uFVolumeMl )// user provided ultrafiltration volume to be set and validated
+BOOL validateAndSetUFVolume( F32 uFVolumeMl )
 {
+    BOOL accepted = FALSE;
+    REQUEST_REJECT_REASON_CODE_T rejReason = REQUEST_REJECT_REASON_NONE;
+    F32  uFVolumeL = uFVolumeMl / (F32)ML_PER_LITER;
 
+    // validate given UF volume    TODO - check dependencies too
+    accepted = setTreatmentParameterF32( TREATMENT_PARAM_UF_VOLUME, uFVolumeL );
+    if ( FALSE == accepted )
+    {
+        rejReason = REQUEST_REJECT_REASON_UF_VOLUME_OUT_OF_RANGE;
+    }
+
+    // respond to set treatment parameters request message
+    uFVolumeL = getTreatmentParameterF32( TREATMENT_PARAM_UF_VOLUME );
+    uFVolumeMl = uFVolumeL * (F32)ML_PER_LITER;
+    sendUFVolumeSetResponseMsg( accepted, rejReason, uFVolumeMl );
+
+    return accepted;
 }
 
 /*********************************************************************//**