diff --git a/Piping/Water tank 500L.FCStd b/Piping/Water tank 500L.FCStd
new file mode 100644
index 00000000..1d2d0c9d
Binary files /dev/null and b/Piping/Water tank 500L.FCStd differ
diff --git a/Piping/Water tank 500L.step b/Piping/Water tank 500L.step
new file mode 100644
index 00000000..d1954ce8
--- /dev/null
+++ b/Piping/Water tank 500L.step	
@@ -0,0 +1,774 @@
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+#597 = ADVANCED_FACE('',(#598),#580,.T.);
+#598 = FACE_BOUND('',#599,.T.);
+#599 = EDGE_LOOP('',(#600));
+#600 = ORIENTED_EDGE('',*,*,#565,.F.);
+#601 = ( GEOMETRIC_REPRESENTATION_CONTEXT(3) 
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#605)) GLOBAL_UNIT_ASSIGNED_CONTEXT
+((#602,#603,#604)) REPRESENTATION_CONTEXT('Context #1',
+  '3D Context with UNIT and UNCERTAINTY') );
+#602 = ( LENGTH_UNIT() NAMED_UNIT(*) SI_UNIT(.MILLI.,.METRE.) );
+#603 = ( NAMED_UNIT(*) PLANE_ANGLE_UNIT() SI_UNIT($,.RADIAN.) );
+#604 = ( NAMED_UNIT(*) SI_UNIT($,.STERADIAN.) SOLID_ANGLE_UNIT() );
+#605 = UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-07),#602,
+  'distance_accuracy_value','confusion accuracy');
+#606 = SHAPE_DEFINITION_REPRESENTATION(#607,#25);
+#607 = PRODUCT_DEFINITION_SHAPE('','',#608);
+#608 = PRODUCT_DEFINITION('design','',#609,#612);
+#609 = PRODUCT_DEFINITION_FORMATION('','',#610);
+#610 = PRODUCT('Fillet001','Fillet001','',(#611));
+#611 = MECHANICAL_CONTEXT('',#2,'mechanical');
+#612 = PRODUCT_DEFINITION_CONTEXT('part definition',#2,'design');
+#613 = CONTEXT_DEPENDENT_SHAPE_REPRESENTATION(#614,#616);
+#614 = ( REPRESENTATION_RELATIONSHIP('','',#25,#10) 
+REPRESENTATION_RELATIONSHIP_WITH_TRANSFORMATION(#615) 
+SHAPE_REPRESENTATION_RELATIONSHIP() );
+#615 = ITEM_DEFINED_TRANSFORMATION('','',#11,#15);
+#616 = PRODUCT_DEFINITION_SHAPE('Placement','Placement of an item',#617
+  );
+#617 = NEXT_ASSEMBLY_USAGE_OCCURRENCE('1','=>[0:1:1:2]','',#5,#608,$);
+#618 = PRODUCT_TYPE('part',$,(#610));
+#619 = MECHANICAL_DESIGN_GEOMETRIC_PRESENTATION_REPRESENTATION('',(#620)
+  ,#601);
+#620 = STYLED_ITEM('color',(#621),#26);
+#621 = PRESENTATION_STYLE_ASSIGNMENT((#622,#628));
+#622 = SURFACE_STYLE_USAGE(.BOTH.,#623);
+#623 = SURFACE_SIDE_STYLE('',(#624));
+#624 = SURFACE_STYLE_FILL_AREA(#625);
+#625 = FILL_AREA_STYLE('',(#626));
+#626 = FILL_AREA_STYLE_COLOUR('',#627);
+#627 = COLOUR_RGB('',0.415686279535,0.415686279535,0.415686279535);
+#628 = CURVE_STYLE('',#629,POSITIVE_LENGTH_MEASURE(0.1),#627);
+#629 = DRAUGHTING_PRE_DEFINED_CURVE_FONT('continuous');
+ENDSEC;
+END-ISO-10303-21;
diff --git a/Piping/Water tank 500L.stl b/Piping/Water tank 500L.stl
new file mode 100644
index 00000000..0576f3f1
Binary files /dev/null and b/Piping/Water tank 500L.stl differ