Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs
===================================================================
diff -u -r5cba53b7cc9ed25e641eb02e2292a885945b0e20 -r1dc7aca66fba19cdc15c81d6b5d2d48f2625ebc0
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision 5cba53b7cc9ed25e641eb02e2292a885945b0e20)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision 1dc7aca66fba19cdc15c81d6b5d2d48f2625ebc0)
@@ -507,28 +507,13 @@
             }
             else
             {
-                if (double.IsNaN(inputParameters.Orientation))
-                {
-                    string message = string.Format(RingtoetsCommonServiceResources.Validation_ValidateInput_No_concrete_value_entered_for_ParameterName_0_,
-                                                   ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonForms.Orientation_DisplayName));
-                    validationResult.Add(message);
-                }
-                if (IsInconcreteValue(inputParameters.DikeHeight))
-                {
-                    string message = string.Format(RingtoetsCommonServiceResources.Validation_ValidateInput_No_concrete_value_entered_for_ParameterName_0_,
-                                                   ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonForms.DikeHeight_DisplayName));
-                    validationResult.Add(message);
-                }
+                validationResult.AddRange(new NumericInputRule(inputParameters.Orientation, ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonForms.Orientation_DisplayName)).Validate());
+                validationResult.AddRange(new NumericInputRule(inputParameters.DikeHeight, ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonForms.DikeHeight_DisplayName)).Validate());
             }
 
             validationResult.AddRange(new UseBreakWaterRule(inputParameters).Validate());
 
             return validationResult.ToArray();
         }
-
-        private static bool IsInconcreteValue(double parameter)
-        {
-            return double.IsNaN(parameter) || double.IsInfinity(parameter);
-        }
     }
 }
\ No newline at end of file