Index: Ringtoets/Piping/src/Ringtoets.Piping.Primitives/RingtoetsPipingSurfaceLine.cs
===================================================================
diff -u -r130efbf0e33a64b60dc853347a93f182bf6f1749 -r5b63cfab474523f97be999403eb4906a0c376a3d
--- Ringtoets/Piping/src/Ringtoets.Piping.Primitives/RingtoetsPipingSurfaceLine.cs	(.../RingtoetsPipingSurfaceLine.cs)	(revision 130efbf0e33a64b60dc853347a93f182bf6f1749)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Primitives/RingtoetsPipingSurfaceLine.cs	(.../RingtoetsPipingSurfaceLine.cs)	(revision 5b63cfab474523f97be999403eb4906a0c376a3d)
@@ -256,7 +256,7 @@
 
             IEnumerable<Point2D> intersectionPoints = Math2D.SegmentsIntersectionWithVerticalLine(segments, l).OrderBy(p => p.Y).ToArray();
 
-            const double intersectionTolerance = 1e-8;
+            const double intersectionTolerance = 1e-6;
             bool equalIntersections = Math.Abs((double) (intersectionPoints.First().Y - intersectionPoints.Last().Y)) < intersectionTolerance;
 
             if (equalIntersections)