Index: DamEngine/trunk/src/Deltares.DamEngine.Data/General/Physics.cs
===================================================================
diff -u -r4540 -r6136
--- DamEngine/trunk/src/Deltares.DamEngine.Data/General/Physics.cs	(.../Physics.cs)	(revision 4540)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/General/Physics.cs	(.../Physics.cs)	(revision 6136)
@@ -24,9 +24,7 @@
 public class Physics
 {
     public const double FactorMicroMeterToMeter = 1E-06;
-    public const double FactorMeterToMicroMeter = 1000000.0;
     public const double GravityConstant = 9.81;
-    public const double WaterDensity = 1000.0;
     public const double WaterViscosity = 1.33E-06;
     public const double UnitWeightOfwater = 9.81;
 }
\ No newline at end of file
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapper.cs
===================================================================
diff -u -r6133 -r6136
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapper.cs	(.../WtiPipingBlighKernelWrapper.cs)	(revision 6133)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapper.cs	(.../WtiPipingBlighKernelWrapper.cs)	(revision 6136)
@@ -297,7 +297,7 @@
             double xExit = upliftLocationAndResult.X;
             double surfaceLevel = surfaceLine.Geometry.GetZatX(upliftLocationAndResult.X);
             SoilLayer1D heaveLayer = soilProfile1D.GetLayerWithName(upliftLocationAndResult.LayerWhereUpliftOccuresId);
-            double d70 = Physics.FactorMeterToMicroMeter * heaveLayer.Soil.DiameterD70;
+            double d70 = heaveLayer.Soil.DiameterD70;
             double topLevelAquifer = soilProfile1D.GetLayerWithName(upliftLocationAndResult.LayerWhereUpliftOccuresId).TopLevel;
             double dCoverLayer = WtiPipingHelper.DetermineHeightCoverLayer(topLevelAquifer, surfaceLevel);
             double? upliftFactor = upliftLocationAndResult.UpliftFactor;
@@ -371,7 +371,7 @@
             Rc = wtiPipingBlighInput.Rc,
             DTotal = wtiPipingBlighInput.DTotal,
             SeepageLength = wtiPipingBlighInput.SeepageLength,
-            D50 = 0.81 * wtiPipingBlighInput.D70 * Physics.FactorMicroMeterToMeter,
+            D50 = 0.81 * wtiPipingBlighInput.D70,
             ModelFactorPiping = 1
         };
         return calculator;