diff --git a/test_tjnetwork.py b/test_tjnetwork.py
index 1456dbb..8c8e37e 100644
--- a/test_tjnetwork.py
+++ b/test_tjnetwork.py
@@ -1526,6 +1526,46 @@ class TestApi:
         self.leave(p)
 
 
+    def test_valve_del(self):
+        p = 'test_valve_del'
+        self.enter(p)
+
+        add_junction(p, ChangeSet({'id': 'j0', 'x': 0.0, 'y': 10.0, 'elevation': 20.0}))
+        add_junction(p, ChangeSet({'id': 'j1', 'x': 0.0, 'y': 10.0, 'elevation': 20.0}))
+        add_valve(p, ChangeSet({'id': 'v0', 'node1': 'j0', 'node2': 'j1', 'diameter': 10.0, 'v_type': VALVES_TYPE_FCV, 'setting': 0.1, 'minor_loss': 0.5 }))
+        set_tag(p, ChangeSet({'t_type': TAG_TYPE_LINK, 'id': 'v0', 'tag': 'v0t' }))
+        set_status(p, ChangeSet({'link': 'v0', 'status': LINK_STATUS_OPEN, 'setting': 10.0}))
+        set_vertex(p, ChangeSet({'link' : 'v0', 'coords': [{'x': 1.0, 'y': 2.0}, {'x': 2.0, 'y': 1.0}]}))
+        assert is_valve(p, 'v0')
+        assert get_tag(p, TAG_TYPE_LINK, 'v0')['tag'] == 'v0t'
+        assert get_status(p, 'v0')['status'] == LINK_STATUS_OPEN
+        assert get_status(p, 'v0')['setting'] == 10.0
+        assert get_vertex(p, 'v0')['coords'] == [{'x': 1.0, 'y': 2.0}, {'x': 2.0, 'y': 1.0}]
+
+        delete_valve(p, ChangeSet({'id': 'v0'}))
+        assert is_valve(p, 'v0') == False
+        assert get_tag(p, TAG_TYPE_LINK, 'v0')['tag'] == None
+        assert get_status(p, 'v0')['status'] == None
+        assert get_status(p, 'v0')['setting'] == None
+        assert get_vertex(p, 'v0')['coords'] == []
+
+        execute_undo(p)
+        assert is_valve(p, 'v0')
+        assert get_tag(p, TAG_TYPE_LINK, 'v0')['tag'] == 'v0t'
+        assert get_status(p, 'v0')['status'] == LINK_STATUS_OPEN
+        assert get_status(p, 'v0')['setting'] == 10.0
+        assert get_vertex(p, 'v0')['coords'] == [{'x': 1.0, 'y': 2.0}, {'x': 2.0, 'y': 1.0}]
+
+        execute_redo(p)
+        assert is_valve(p, 'v0') == False
+        assert get_tag(p, TAG_TYPE_LINK, 'v0')['tag'] == None
+        assert get_status(p, 'v0')['status'] == None
+        assert get_status(p, 'v0')['setting'] == None
+        assert get_vertex(p, 'v0')['coords'] == []
+
+        self.leave(p)
+
+
     # 8 tag