Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingInput.cs
===================================================================
diff -u -r1e4d77c17c6eac78bfd705efdff9e52b4fca2c7e -r4af59f05cb6ced6464d51c8dff8cb0b8bfca8edd
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingInput.cs	(.../PipingInput.cs)	(revision 1e4d77c17c6eac78bfd705efdff9e52b4fca2c7e)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingInput.cs	(.../PipingInput.cs)	(revision 4af59f05cb6ced6464d51c8dff8cb0b8bfca8edd)
@@ -24,6 +24,7 @@
 using Core.Common.Base;
 using Core.Common.Base.Data;
 using Core.Common.Base.Geometry;
+using Ringtoets.Common.Data.Calculation;
 using Ringtoets.Common.Data.Probabilistics;
 using Ringtoets.HydraRing.Data;
 using Ringtoets.Piping.Data.Properties;
@@ -35,7 +36,7 @@
     /// Class that holds all piping calculation specific input parameters, e.g. the values
     /// that can differ across various calculations.
     /// </summary>
-    public class PipingInput : Observable
+    public class PipingInput : Observable, ICalculationInput
     {
         private readonly GeneralPipingInput generalInputParameters;
         private readonly NormalDistribution phreaticLevelExit;