Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Data/HydraulicBoundaryLocation.cs
===================================================================
diff -u -r3d995a76fbe93cf9801596e6b959e7f5bcde5805 -ra66aa951d2a8308c55c9e7feaa07fd2cbcb9b7f7
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Data/HydraulicBoundaryLocation.cs	(.../HydraulicBoundaryLocation.cs)	(revision 3d995a76fbe93cf9801596e6b959e7f5bcde5805)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Data/HydraulicBoundaryLocation.cs	(.../HydraulicBoundaryLocation.cs)	(revision a66aa951d2a8308c55c9e7feaa07fd2cbcb9b7f7)
@@ -72,7 +72,7 @@
         public Point2D Location { get; private set; }
 
         /// <summary>
-        /// Gets the design water level of <see cref="HydraulicBoundaryLocation"/>.
+        /// Gets or sets the design water level of <see cref="HydraulicBoundaryLocation"/>.
         /// </summary>
         public RoundedDouble DesignWaterLevel
         {
@@ -87,7 +87,7 @@
         }
 
         /// <summary>
-        /// Gets the wave height of <see cref="HydraulicBoundaryLocation"/>.
+        /// Gets or sets the wave height of <see cref="HydraulicBoundaryLocation"/>.
         /// </summary>
         public RoundedDouble WaveHeight
         {
Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/DerivedPipingInput.cs
===================================================================
diff -u -r06abcaadc2936c0bf3fde73916c051f37f698505 -ra66aa951d2a8308c55c9e7feaa07fd2cbcb9b7f7
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/DerivedPipingInput.cs	(.../DerivedPipingInput.cs)	(revision 06abcaadc2936c0bf3fde73916c051f37f698505)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/DerivedPipingInput.cs	(.../DerivedPipingInput.cs)	(revision a66aa951d2a8308c55c9e7feaa07fd2cbcb9b7f7)
@@ -49,7 +49,7 @@
         {
             if (input == null)
             {
-                throw new ArgumentNullException("input", "Cannot create DerivedPipingInput without PipingInput.");
+                throw new ArgumentNullException("input", @"Cannot create DerivedPipingInput without PipingInput.");
             }
             this.input = input;
         }
@@ -63,7 +63,7 @@
             {
                 return input.HydraulicBoundaryLocation == null ?
                            new RoundedDouble(2, double.NaN) :
-                           new RoundedDouble(2, input.HydraulicBoundaryLocation.DesignWaterLevel);
+                           input.HydraulicBoundaryLocation.DesignWaterLevel;
             }
         }