Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedInput.cs
===================================================================
diff -u -r4709 -r4718
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedInput.cs	(.../WtiPipingSellmeijerRevisedInput.cs)	(revision 4709)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedInput.cs	(.../WtiPipingSellmeijerRevisedInput.cs)	(revision 4718)
@@ -89,20 +89,20 @@
     public double BottomLevelAquitardAboveExitPointZ { get; set; } = double.NaN;
 
     /// <summary>
-    /// Gets or sets the whites drag coefficient.
+    /// The whites drag coefficient as readonly.
     /// </summary>
     /// <value>
     /// The whites drag coefficient.
     /// </value>
-    public double WhitesDragCoefficient = WTIPipingConstants.WhitesDragCoefficient;
+    public readonly double WhitesDragCoefficient = WTIPipingConstants.WhitesDragCoefficient;
 
     /// <summary>
-    /// Gets or sets the bedding angle.
+    /// The bedding angle as readonly.
     /// </summary>
     /// <value>
     /// The bedding angle.
     /// </value>
-    public double BeddingAngle = WTIPipingConstants.BeddingAngleSellmeijerRevised;
+    public readonly double BeddingAngle = WTIPipingConstants.BeddingAngleSellmeijerRevised;
 
     /// <summary>
     /// Gets or sets the gamma sub particles.
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedKernelWrapperTests.cs
===================================================================
diff -u -r4628 -r4718
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedKernelWrapperTests.cs	(.../WtiPipingSellmeijerRevisedKernelWrapperTests.cs)	(revision 4628)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiPipingSellmeijerRevised/WtiPipingSellmeijerRevisedKernelWrapperTests.cs	(.../WtiPipingSellmeijerRevisedKernelWrapperTests.cs)	(revision 4718)
@@ -61,8 +61,6 @@
             DAquifer = 8.0,
             SeepageLength = 40.5,
             D70 = 200.0,
-            WhitesDragCoefficient = 0.25,
-            BeddingAngle = 37.0,
             KinematicViscosityWater = 1.33E-06,
             DarcyPermeability = 0.0001,
             RExit = 0.25