Index: dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/Deltares.DamEngine.Interface.Tests.csproj
===================================================================
diff -u -r715 -r749
--- dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/Deltares.DamEngine.Interface.Tests.csproj	(.../Deltares.DamEngine.Interface.Tests.csproj)	(revision 715)
+++ dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/Deltares.DamEngine.Interface.Tests.csproj	(.../Deltares.DamEngine.Interface.Tests.csproj)	(revision 749)
@@ -66,6 +66,7 @@
     <Compile Include="MacroStabilityTests.cs" />
     <Compile Include="PipingBlighTests.cs" />
     <Compile Include="PipingSellmeijer4ForcesTests.cs" />
+    <Compile Include="PipingSellmeijerVnkTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
Index: dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/PipingSellmeijerVnkTests.cs
===================================================================
diff -u
--- dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/PipingSellmeijerVnkTests.cs	(revision 0)
+++ dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/PipingSellmeijerVnkTests.cs	(revision 749)
@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Deltares.DamEngine.Io;
+using NUnit.Framework;
+
+namespace Deltares.DamEngine.Interface.Tests
+{
+    [TestFixture]
+    public class PipingSellmeijerVnkTests
+    {
+        private const double tolerance = 0.0005;
+
+        [Test]
+        public void CanPerformSellmeijer4ForcesDesignPipingVoorbeeld1()
+        {
+            const string fileName = @"TestFiles\PipingVoorbeeld1_SellmeijerVNKInputFile.xml";
+            string inputString = File.ReadAllText(fileName);
+            EngineInterface engineInterface = new EngineInterface(inputString);
+            Assert.IsNotNull(engineInterface.DamProjectData);
+            string outputString = engineInterface.Run();
+            // Factor piping = 0.463
+            // Kritische hoogte = 1.619
+            // Factor opdrijven = 0.351
+            // Kwelweglengte piping = 25.0
+            // Intredepunt x-lokaal = 10.0
+            // Uittredepunt x-lokaal = 35.0
+            // Opdrijven = true
+            // Profielnaam = soilprofile_01
+            // PL3 opdrijven = 0.582
+            // PL3 stijghoogte aangepast = 1.262
+            // PL3 locatie opdriven lokaal = 35.0
+            // PL4 opdrijven = 0.0
+            // PL4 stijghoogte aangepast = 0.0
+            // PL4 locatie opdrijven lokaal = 0.0
+            // Locatie naam = "profiel 1"
+            // ID locatie scenario = "1"
+            // Heave Factor = 90.0
+            Assert.IsNotNull(outputString);
+            var output = DamXmlSerialization.LoadOutputFromXmlString(outputString);
+            Assert.AreEqual(0.463, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.Sellmeijer4ForcesFactor, tolerance);
+            Assert.AreEqual(1.759, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.Sellmeijer4ForcesHcritical, tolerance);
+            Assert.AreEqual(35.0, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.ExitPointX, tolerance);
+            // The following values are not the same as in the classic UI
+            // The upliftfactor there is 0.351, but that is the Wti Upliftfactor
+            // The adjusted PL3/PL4 values there are not 0.0, but those are the values for stability; for piping no adjustment has to be made
+            Assert.AreEqual(0.5825, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftFactor, tolerance);
+            Assert.AreEqual(true, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftSituation.IsUplift);
+            Assert.AreEqual(0.0, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftSituation.Pl3MinUplift, tolerance);
+            Assert.AreEqual(0.0, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftSituation.Pl3HeadAdjusted, tolerance);
+            Assert.AreEqual(0.0, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftSituation.Pl3LocationXMinUplift, tolerance);
+            Assert.AreEqual(0.0, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftSituation.Pl4MinUplift, tolerance);
+            Assert.AreEqual(0.0, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftSituation.Pl4HeadAdjusted, tolerance);
+            Assert.AreEqual(0.0, output.Results.CalculationResults.DesignResults[0].PipingDesignResults.UpliftSituation.Pl4LocationXMinUplift, tolerance);
+        }
+
+    }
+}