Index: Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingCalculationService.cs
===================================================================
diff -u -r3a89e41054c6cfe6babdc150e8282cbe4a6dc672 -r7ee19b11cabfc6cb2ba1ab895462b024a621294b
--- Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingCalculationService.cs	(.../PipingCalculationService.cs)	(revision 3a89e41054c6cfe6babdc150e8282cbe4a6dc672)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingCalculationService.cs	(.../PipingCalculationService.cs)	(revision 7ee19b11cabfc6cb2ba1ab895462b024a621294b)
@@ -229,6 +229,14 @@
                 {
                     warnings.Add(Resources.PipingCalculationService_GetInputWarnings_Multiple_coverage_layers_Attempt_to_determine_value_from_combination);
                 }
+                if (!double.IsNaN(inputParameters.Diameter70.Mean) && !double.IsNaN(inputParameters.Diameter70.StandardDeviation))
+                {
+                    var diameter70Value = PipingSemiProbabilisticDesignValueFactory.GetDiameter70(inputParameters).GetDesignValue();
+                    if (diameter70Value < 6.3e-5|| diameter70Value > 0.5e-3)
+                    {
+                        warnings.Add(string.Format(Resources.PipingCalculationService_GetInputWarnings_Specified_DiameterD70_value_0_not_in_valid_range_of_model, diameter70Value));
+                    }
+                }
             }
 
             return warnings;
Index: Ringtoets/Piping/src/Ringtoets.Piping.Service/Properties/Resources.Designer.cs
===================================================================
diff -u -re12f4d3c8a659d72f0550416b85df98bb0e6f7dd -r7ee19b11cabfc6cb2ba1ab895462b024a621294b
--- Ringtoets/Piping/src/Ringtoets.Piping.Service/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision e12f4d3c8a659d72f0550416b85df98bb0e6f7dd)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Service/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 7ee19b11cabfc6cb2ba1ab895462b024a621294b)
@@ -22,7 +22,7 @@
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
-//     Runtime Version:4.0.30319.42000
+//     Runtime Version:4.0.30319.17929
 //
 //     Changes to this file may cause incorrect behavior and will be lost if
 //     the code is regenerated.
@@ -111,6 +111,16 @@
         }
         
         /// <summary>
+        ///   Looks up a localized string similar to Gespecificeerde waarde voor d70 ({0} m) ligt buiten het geldigheidsbereik van dit model. Geldige waarden liggen tussen 0.000063 m en 0.0005 m..
+        /// </summary>
+        internal static string PipingCalculationService_GetInputWarnings_Specified_DiameterD70_value_0_not_in_valid_range_of_model {
+            get {
+                return ResourceManager.GetString("PipingCalculationService_GetInputWarnings_Specified_DiameterD70_value_0_not_in_va" +
+                        "lid_range_of_model", resourceCulture);
+            }
+        }
+        
+        /// <summary>
         ///   Looks up a localized string similar to Kan de definitie voor de doorlatendheid van de watervoerende laag niet (volledig) afleiden..
         /// </summary>
         internal static string PipingCalculationService_ValidateInput_Cannot_derive_DarcyPermeability {
Index: Ringtoets/Piping/src/Ringtoets.Piping.Service/Properties/Resources.resx
===================================================================
diff -u -re12f4d3c8a659d72f0550416b85df98bb0e6f7dd -r7ee19b11cabfc6cb2ba1ab895462b024a621294b
--- Ringtoets/Piping/src/Ringtoets.Piping.Service/Properties/Resources.resx	(.../Resources.resx)	(revision e12f4d3c8a659d72f0550416b85df98bb0e6f7dd)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Service/Properties/Resources.resx	(.../Resources.resx)	(revision 7ee19b11cabfc6cb2ba1ab895462b024a621294b)
@@ -171,4 +171,7 @@
   <data name="PipingCalculationService_ValidateInput_Cannot_derive_SaturatedVolumicWeight" xml:space="preserve">
     <value>Kan de definitie voor het verzadigd gewicht van de deklaag niet (volledig) afleiden.</value>
   </data>
+  <data name="PipingCalculationService_GetInputWarnings_Specified_DiameterD70_value_0_not_in_valid_range_of_model" xml:space="preserve">
+    <value>Gespecificeerde waarde voor d70 ({0} m) ligt buiten het geldigheidsbereik van dit model. Geldige waarden liggen tussen 0.000063 m en 0.0005 m.</value>
+  </data>
 </root>
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil/PipingCalculationScenarioFactory.cs
===================================================================
diff -u -r4ce321e0acec2ea04fe99f4e855d319b0ac17298 -r7ee19b11cabfc6cb2ba1ab895462b024a621294b
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil/PipingCalculationScenarioFactory.cs	(.../PipingCalculationScenarioFactory.cs)	(revision 4ce321e0acec2ea04fe99f4e855d319b0ac17298)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil/PipingCalculationScenarioFactory.cs	(.../PipingCalculationScenarioFactory.cs)	(revision 7ee19b11cabfc6cb2ba1ab895462b024a621294b)
@@ -160,7 +160,7 @@
                     {
                         IsAquifer = true,
                         DiameterD70Deviation = 0,
-                        DiameterD70Mean = 1.0,
+                        DiameterD70Mean = 4.0e-4,
                         PermeabilityDeviation = 0,
                         PermeabilityMean = 1.0
                     }
Index: Ringtoets/Piping/test/Ringtoets.Piping.Service.Test/PipingCalculationServiceTest.cs
===================================================================
diff -u -r4ce321e0acec2ea04fe99f4e855d319b0ac17298 -r7ee19b11cabfc6cb2ba1ab895462b024a621294b
--- Ringtoets/Piping/test/Ringtoets.Piping.Service.Test/PipingCalculationServiceTest.cs	(.../PipingCalculationServiceTest.cs)	(revision 4ce321e0acec2ea04fe99f4e855d319b0ac17298)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Service.Test/PipingCalculationServiceTest.cs	(.../PipingCalculationServiceTest.cs)	(revision 7ee19b11cabfc6cb2ba1ab895462b024a621294b)
@@ -318,8 +318,8 @@
                                                     new PipingSoilLayer(2.0)
                                                     {
                                                         IsAquifer = true,
-                                                        DiameterD70Deviation = random.NextDouble(),
-                                                        DiameterD70Mean = 0.1 + random.NextDouble(),
+                                                        DiameterD70Deviation = 0,
+                                                        DiameterD70Mean = 0.1e-3,
                                                         PermeabilityDeviation = random.NextDouble(),
                                                         PermeabilityMean = 0.1 + random.NextDouble()
                                                     }
@@ -365,8 +365,8 @@
                                                     new PipingSoilLayer(11.0)
                                                     {
                                                         IsAquifer = true,
-                                                        DiameterD70Deviation = random.NextDouble(),
-                                                        DiameterD70Mean = 0.1 + random.NextDouble(),
+                                                        DiameterD70Deviation = 0,
+                                                        DiameterD70Mean = 0.1e-3,
                                                         PermeabilityDeviation = random.NextDouble(),
                                                         PermeabilityMean = 0.1 + random.NextDouble()
                                                     }
@@ -468,8 +468,8 @@
             var incompletePipingSoilLayer = new PipingSoilLayer(5.0)
             {
                 IsAquifer = true,
-                DiameterD70Deviation = random.NextDouble(),
-                DiameterD70Mean = 0.1 + random.NextDouble()
+                DiameterD70Deviation = 0,
+                DiameterD70Mean = 0.1e-3
             };
             if (meanSet)
             {
@@ -552,8 +552,8 @@
                                                         IsAquifer = true,
                                                         PermeabilityDeviation = random.NextDouble(),
                                                         PermeabilityMean = 0.1 + random.NextDouble(),
-                                                        DiameterD70Deviation = random.NextDouble(),
-                                                        DiameterD70Mean = 0.1 + random.NextDouble()
+                                                        DiameterD70Deviation = 0,
+                                                        DiameterD70Mean = 0.1e-3
                                                     }
                                                 },
                                                 SoilProfileType.SoilProfile1D, -1);
@@ -610,8 +610,8 @@
                                                         IsAquifer = true,
                                                         PermeabilityDeviation = random.NextDouble(),
                                                         PermeabilityMean = 0.1 + random.NextDouble(),
-                                                        DiameterD70Deviation = random.NextDouble(),
-                                                        DiameterD70Mean = 0.1 + random.NextDouble()
+                                                        DiameterD70Deviation = 0,
+                                                        DiameterD70Mean = 0.1e-3
                                                     }
                                                 },
                                                 SoilProfileType.SoilProfile1D, -1);
@@ -638,6 +638,57 @@
         }
 
         [Test]
+        [TestCase(6.2e-5)]
+        [TestCase(5.1e-3)]
+        public void Validate_CalculationWithInvalidDiameterD70Value_LogsWarningAndReturnsTrue(double diameter70Value)
+        {
+            // Setup
+            const string name = "<very nice name>";
+
+            var random = new Random(21);
+            var soilLayer = new PipingSoilLayer(5.0)
+            {
+                IsAquifer = true,
+                PermeabilityDeviation = random.NextDouble(),
+                PermeabilityMean = 0.1 + random.NextDouble(),
+                DiameterD70Mean = diameter70Value,
+                DiameterD70Deviation = 0
+            };
+
+            var profile = new PipingSoilProfile(string.Empty, 0.0,
+                                                new[]
+                                                {
+                                                    new PipingSoilLayer(10.5)
+                                                    {
+                                                        IsAquifer = false,
+                                                        BelowPhreaticLevelDeviation = random.GetFromRange(1e-6, 999.999),
+                                                        BelowPhreaticLevelMean = random.GetFromRange(10.0, 999.999),
+                                                        BelowPhreaticLevelShift = random.GetFromRange(1e-6, 10.0)
+                                                    },
+                                                    soilLayer
+                                                },
+                                                SoilProfileType.SoilProfile1D, -1);
+
+            PipingCalculation pipingCalculation = PipingCalculationScenarioFactory.CreatePipingCalculationScenarioWithValidInput();
+            pipingCalculation.Name = name;
+            pipingCalculation.InputParameters.StochasticSoilProfile.SoilProfile = profile;
+
+            // Call
+            Action call = () => PipingCalculationService.Validate(pipingCalculation);
+
+            // Assert
+            TestHelper.AssertLogMessages(call, messages =>
+            {
+                var msgs = messages.ToArray();
+                Assert.AreEqual(3, msgs.Length);
+                StringAssert.StartsWith(string.Format("Validatie van '{0}' gestart om: ", name), msgs.First());
+                Assert.AreEqual(string.Format("Gespecificeerde waarde voor d70 ({0} m) ligt buiten het geldigheidsbereik van dit model. Geldige waarden liggen tussen 0.000063 m en 0.0005 m.",
+                                              new RoundedDouble(6, diameter70Value)), msgs[1]);
+                StringAssert.StartsWith(string.Format("Validatie van '{0}' beëindigd om: ", name), msgs.Last());
+            });
+        }
+
+        [Test]
         public void Calculate_ValidPipingCalculation_LogStartAndEndOfValidatingInputsAndCalculation()
         {
             // Setup