diff --git a/api/batch_api_cs.py b/api/batch_api_cs.py
index 6db3f3a..755a8e4 100644
--- a/api/batch_api_cs.py
+++ b/api/batch_api_cs.py
@@ -191,29 +191,6 @@ def delete_curve_cascade_batch_cs(name: str, cs: ChangeSet) -> ChangeSet:
     return result
 
 
-def del_cascade_cs(name: str, cs: ChangeSet) -> ChangeSet:
-    type = cs.operations[0]['type']
-
-    if type == s2_junction:
-        return delete_junction_cascade_batch_cs(name, cs)
-    elif type == s3_reservoir:
-        return delete_reservoir_cascade_batch_cs(name, cs)
-    elif type == s4_tank:
-        return delete_tank_cascade_batch_cs(name, cs)
-    elif type == s5_pipe:
-        return delete_pipe_cascade_batch_cs(name, cs)
-    elif type == s6_pump:
-        return delete_pump_cascade_batch_cs(name, cs)
-    elif type == s7_valve:
-        return delete_valve_cascade_batch_cs(name, cs)
-    elif type == s11_pattern:
-        return delete_pattern_cascade_batch_cs(name, cs)
-    elif type == s12_curve:
-        return delete_curve_cascade_batch_cs(name, cs)
-
-    return cs
-
-
 def set_option_cs(cs: ChangeSet) -> ChangeSet:
     cs.operations[0]['operation'] = API_UPDATE
     cs.operations[0]['type'] = 'option'
@@ -230,36 +207,6 @@ def set_option_v3_cs(cs: ChangeSet) -> ChangeSet:
     return new_cs
 
 
-def clean_scada_device_cs(name: str) -> ChangeSet:
-    cs = ChangeSet()
-
-    rows = read_all(name, 'select id from scada_device acs')
-    for row in rows:
-        cs.delete({ 'type': 'scada_device', 'id': row['id'] })
-
-    return cs
-
-
-def clean_scada_device_data_cs(name: str) -> ChangeSet:
-    cs = ChangeSet()
-
-    rows = read_all(name, 'select distinct device_id from scada_device_data acs')
-    for row in rows:
-        cs.update({ 'type': 'scada_device_data', 'device_id': row['device_id'], 'data': [] })
-
-    return cs
-
-
-def clean_scada_element_cs(name: str) -> ChangeSet:
-    cs = ChangeSet()
-
-    rows = read_all(name, 'select id from scada_element acs')
-    for row in rows:
-        cs.delete({ 'type': 'scada_element', 'id': row['id'] })
-
-    return cs
-
-
 def rewrite_batch_api(name: str, cs: ChangeSet) -> ChangeSet:
     op = cs.operations[0]
     api = op['operation']
@@ -288,6 +235,4 @@ def rewrite_batch_api(name: str, cs: ChangeSet) -> ChangeSet:
         elif type == s23_option_v3:
             return set_option_v3_cs(cs)
 
-    # TODO: support clean
-
     return cs
diff --git a/api/clean_api.py b/api/clean_api.py
index 178d380..ba3d7f8 100644
--- a/api/clean_api.py
+++ b/api/clean_api.py
@@ -1,9 +1,38 @@
-from .database import ChangeSet
-from .batch_api_cs import clean_scada_device_cs, clean_scada_device_data_cs, clean_scada_element_cs
+from .database import ChangeSet, read_all
 from .batch_exe import execute_batch_command
 
 # TODO: merge to batch_api
 
+def clean_scada_device_cs(name: str) -> ChangeSet:
+    cs = ChangeSet()
+
+    rows = read_all(name, 'select id from scada_device acs')
+    for row in rows:
+        cs.delete({ 'type': 'scada_device', 'id': row['id'] })
+
+    return cs
+
+
+def clean_scada_device_data_cs(name: str) -> ChangeSet:
+    cs = ChangeSet()
+
+    rows = read_all(name, 'select distinct device_id from scada_device_data acs')
+    for row in rows:
+        cs.update({ 'type': 'scada_device_data', 'device_id': row['device_id'], 'data': [] })
+
+    return cs
+
+
+def clean_scada_element_cs(name: str) -> ChangeSet:
+    cs = ChangeSet()
+
+    rows = read_all(name, 'select id from scada_element acs')
+    for row in rows:
+        cs.delete({ 'type': 'scada_element', 'id': row['id'] })
+
+    return cs
+
+
 def clean_scada_device(name: str) -> ChangeSet:
     return execute_batch_command(name, clean_scada_device_cs(name))