Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/DerivedPipingInput.cs
===================================================================
diff -u -rc61ef8d3ee0558d0a032085a3f1b3cc4c0503b64 -r2ed0db8299205024c1c6b1eb10da05f588f5d649
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/DerivedPipingInput.cs	(.../DerivedPipingInput.cs)	(revision c61ef8d3ee0558d0a032085a3f1b3cc4c0503b64)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/DerivedPipingInput.cs	(.../DerivedPipingInput.cs)	(revision 2ed0db8299205024c1c6b1eb10da05f588f5d649)
@@ -174,7 +174,7 @@
             try
             {
                 var zAtL = surfaceLine.GetZAtL(exitPointL);
-                return soilProfile.GetConsecutiveAquiferLayerThicknessBelowLevel(zAtL);
+                return soilProfile.GetTopmostConsecutiveAquiferLayerThicknessBelowLevel(zAtL);
             }
             catch (ArgumentOutOfRangeException)
             {