Index: src/Plugins/Wti/Wti.Data/PipingData.cs
===================================================================
diff -u -r197fbe469c4b157c584994358432370a45110bff -rf65154bc499025f9f5b37b9de0ebdf8026336020
--- src/Plugins/Wti/Wti.Data/PipingData.cs	(.../PipingData.cs)	(revision 197fbe469c4b157c584994358432370a45110bff)
+++ src/Plugins/Wti/Wti.Data/PipingData.cs	(.../PipingData.cs)	(revision f65154bc499025f9f5b37b9de0ebdf8026336020)
@@ -154,6 +154,11 @@
         public double ExitPointXCoordinate { get; set; }
 
         /// <summary>
+        /// Gets or sets the surface line.
+        /// </summary>
+        public PipingSurfaceLine SurfaceLine { get; set; }
+
+        /// <summary>
         /// Gets or sets <see cref="PipingOutput"/>, which contains the results of a Piping calculation.
         /// </summary>
         public PipingOutput Output { get; set; }