Index: Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingCalculationService.cs
===================================================================
diff -u -r0dfaf04c32ddd8f2ccfe1e244bdc6efcbb3b6857 -r7751f40a2df9299c4510003b45dac7d574cd97c2
--- Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingCalculationService.cs	(.../PipingCalculationService.cs)	(revision 0dfaf04c32ddd8f2ccfe1e244bdc6efcbb3b6857)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingCalculationService.cs	(.../PipingCalculationService.cs)	(revision 7751f40a2df9299c4510003b45dac7d574cd97c2)
@@ -21,6 +21,7 @@
 
 using System.Collections.Generic;
 using System.Linq;
+using Core.Common.Base.Data;
 using Ringtoets.Common.Service;
 using Ringtoets.Piping.Data;
 using Ringtoets.Piping.KernelWrapper;
@@ -200,6 +201,16 @@
                         {
                             validationResult.Add(Resources.PipingCalculationService_ValidateInput_Cannot_derive_SaturatedVolumicWeight);
                         }
+                        else
+                        {
+                            var saturatedVolumicWeightOfCoverageLayer =
+                                PipingSemiProbabilisticDesignValueFactory.GetSaturatedVolumicWeightOfCoverageLayer(inputParameters).GetDesignValue();
+
+                            if (saturatedVolumicWeightOfCoverageLayer < inputParameters.WaterVolumetricWeight)
+                            {
+                                validationResult.Add(Resources.PipingCalculationService_ValidateInput_SaturatedVolumicWeightCoverageLayer_must_be_larger_than_WaterVolumetricWeight);
+                            }
+                        }
                     }
                 }
             }