diff --git a/src/Model/Network/Edge.py b/src/Model/Network/Edge.py
index 086902c6..52708f3e 100644
--- a/src/Model/Network/Edge.py
+++ b/src/Model/Network/Edge.py
@@ -16,16 +16,16 @@
 
 # -*- coding: utf-8 -*-
 
-from Model.Tools.PamhyrDB import PamhyrID
+from Model.Tools.PamhyrDB import SQLSubModel
 from Model.Network.Node import Node
 
 
-class Edge(PamhyrID):
-    def __init__(self, id: int, name: str,
+class Edge(SQLSubModel):
+    def __init__(self, id: int = -1, name: str = "",
                  node1: Node = None,
                  node2: Node = None,
-                 status=None, **kwargs):
-        super(Edge, self).__init__(id=id, status=status, **kwargs)
+                 **kwargs):
+        super(Edge, self).__init__(id=id, **kwargs)
 
         self._name = name
         self.node1 = node1
@@ -77,9 +77,6 @@ class Edge(PamhyrID):
     def is_enable(self):
         return self._enable
 
-    def is_deleted(self):
-        return False
-
     def enable(self, enable=True):
         self._enable = enable
         self.modified()
diff --git a/src/Model/Network/Graph.py b/src/Model/Network/Graph.py
index 47bc632c..19887a0c 100644
--- a/src/Model/Network/Graph.py
+++ b/src/Model/Network/Graph.py
@@ -18,11 +18,13 @@
 
 from functools import reduce
 
+from Model.Tools.PamhyrDB import SQLSubModel
+
 from Model.Network.Node import Node
 from Model.Network.Edge import Edge
 
 
-class Graph(object):
+class Graph(SQLSubModel):
     def __init__(self, **kwargs):
         super(Graph, self).__init__(**kwargs)
 
@@ -164,8 +166,7 @@ class Graph(object):
 
     def _create_edge(self, n1: Node, n2: Node):
         edge = self._edge_ctor(
-            -1,
-            "", n1, n2,
+            node1=n1, node2=n2,
             status=self._status
         )
         return edge
diff --git a/src/Model/Network/Node.py b/src/Model/Network/Node.py
index 1c66a522..ccd6a2a1 100644
--- a/src/Model/Network/Node.py
+++ b/src/Model/Network/Node.py
@@ -16,17 +16,15 @@
 
 # -*- coding: utf-8 -*-
 
-from Model.Tools.PamhyrDB import PamhyrID
+from Model.Tools.PamhyrDB import SQLSubModel
 from Model.Network.Point import Point
 
 
-class Node(PamhyrID):
-    def __init__(self, id: int, name: str,
+class Node(SQLSubModel):
+    def __init__(self, id: int = -1, name: str = "",
                  x: float = 0.0, y: float = 0.0,
-                 status=None, **kwargs):
-        super(Node, self).__init__(id)
-
-        self._status = status
+                 **kwargs):
+        super(Node, self).__init__(id=id, **kwargs)
 
         if name == "":
             self._name = f"Node #{self.pamhyr_id}"
@@ -53,10 +51,7 @@ class Node(PamhyrID):
         elif key == "id":
             self.pamhyr_id = value
 
-        self._status.modified()
-
-    def is_deleted(self):
-        return False
+        self.modified()
 
     @property
     def name(self):
@@ -73,4 +68,4 @@ class Node(PamhyrID):
     def setPos(self, x, y):
         self.pos.x = x
         self.pos.y = y
-        self._status.modified()
+        self.modified()
diff --git a/src/Model/Network/test_network.py b/src/Model/Network/test_network.py
index fb68b6d5..22b4b889 100644
--- a/src/Model/Network/test_network.py
+++ b/src/Model/Network/test_network.py
@@ -60,6 +60,9 @@ class GraphTestCase(unittest.TestCase):
 
         e0 = g.add_edge(n0, n1)
 
+        self.assertEqual(g.nodes_counts(), 2)
+        self.assertEqual(g.edges_counts(), 1)
+
         g.remove_edge(e0)
 
         self.assertEqual(g.nodes_counts(), 2)
diff --git a/src/Model/River.py b/src/Model/River.py
index f3d37f8d..a52e6515 100644
--- a/src/Model/River.py
+++ b/src/Model/River.py
@@ -51,14 +51,14 @@ from Solver.Solvers import solver_type_list
 logger = logging.getLogger()
 
 
-class RiverNode(Node, SQLSubModel):
+class RiverNode(Node):
     _sub_classes = []
 
     def __init__(self, id: int = -1, name: str = "",
                  x: float = 0.0, y: float = 0.0,
                  status=None, owner_scenario=-1):
         super(RiverNode, self).__init__(
-            id, name, x, y,
+            id=id, name=name, x=x, y=y,
             status=status,
             owner_scenario=owner_scenario
         )
@@ -147,7 +147,6 @@ class RiverNode(Node, SQLSubModel):
             y = next(it)
             owner_scenario = next(it)
 
-
             node = cls(
                 id=pid,
                 name=name, x=x, y=y,
@@ -192,7 +191,7 @@ class RiverNode(Node, SQLSubModel):
         self._locker = locker
 
 
-class RiverReach(Edge, SQLSubModel):
+class RiverReach(Edge):
     _sub_classes = [
         Reach,
         FrictionList,
@@ -203,8 +202,8 @@ class RiverReach(Edge, SQLSubModel):
                  node2: RiverNode = None,
                  status=None, owner_scenario=-1):
         super(RiverReach, self).__init__(
-            id, name,
-            node1, node2,
+            id=id, name=name,
+            node1=node1, node2=node2,
             status=status,
             owner_scenario=owner_scenario
         )
@@ -389,7 +388,7 @@ class RiverReach(Edge, SQLSubModel):
         return self._frictions
 
 
-class River(Graph, SQLSubModel):
+class River(Graph):
     _sub_classes = [
         StricklersList,
         SedimentLayerList,
diff --git a/src/Model/Tools/PamhyrDB.py b/src/Model/Tools/PamhyrDB.py
index 1d7d505d..5e8774da 100644
--- a/src/Model/Tools/PamhyrDB.py
+++ b/src/Model/Tools/PamhyrDB.py
@@ -158,8 +158,8 @@ class SQLSubModel(PamhyrID):
     _sub_classes = []
 
     def __init__(self, id: int = -1, status=None,
-                 owner_scenario=-1):
-        super(SQLSubModel, self).__init__(id)
+                 owner_scenario=-1, **kwargs):
+        super(SQLSubModel, self).__init__(id=id, **kwargs)
 
         self._status = status
 
diff --git a/src/Model/Tools/PamhyrID.py b/src/Model/Tools/PamhyrID.py
index 949a0a6d..44dc9cfe 100644
--- a/src/Model/Tools/PamhyrID.py
+++ b/src/Model/Tools/PamhyrID.py
@@ -26,8 +26,8 @@ logger = logging.getLogger()
 class PamhyrID(object):
     _pamhyr_id_cnt = 0
 
-    def __init__(self, id: int = -1):
-        super(PamhyrID, self).__init__()
+    def __init__(self, id: int = -1, **kwargs):
+        super(PamhyrID, self).__init__(**kwargs)
 
         self._pamhyr_id = self.get_new_pamhyr_id(id)