diff --git a/api/s5_pipes.py b/api/s5_pipes.py
new file mode 100644
index 0000000..6f6370f
--- /dev/null
+++ b/api/s5_pipes.py
@@ -0,0 +1,109 @@
+from psycopg.rows import Row
+from .s0_base import *
+from .change_set import ChangeSet
+import utility
+
+
+PIPE_STATUS_OPEN = 'open'
+PIPE_STATUS_CLOSED = 'closed'
+PIPE_STATUS_CV = 'cv'
+
+
+def add_pipe(name: str, id: str, node1: str, node2: str, length: float = 0, diameter: float = 0, roughness: float = 0, minor_loss: float = 0, status: str = PIPE_STATUS_OPEN) -> ChangeSet:
+    if not is_node(name, node1):
+        return
+    if not is_node(name, node2):
+        return
+
+    sql = f"insert into pipes (id, node1, node2, length, diameter, roughness, minor_loss, status) values ('{id}', '{node1}', '{node2}', {length}, {diameter}, {roughness}, {minor_loss}, '{status}');"
+    undo_sql = f'delete from pipes where id = "{id}";'
+    return add_link(name, PIPE, id, sql, undo_sql)
+
+
+def _get_pipe(name: str, id: str) -> Row | None:
+    return utility.query(name, f"select node1, node2, length, diameter, roughness, minor_loss, status from pipes where id = '{id}'")
+
+
+def delete_pipe(name: str, id: str) -> ChangeSet:
+    if not is_pipe(name, id):
+        return
+
+    row = _get_pipe(name, id)
+    if row == None:
+        return
+
+    node1, node2, length, diameter, roughness, minor_loss, status = row['node1'], row['node2'], row['length'], row['diameter'], row['roughness'], row['minor_loss'], row['status']
+
+    sql = f"delete from pipes where id = '{id}';"
+    undo_sql = f'insert into pipes (id, node1, node2, length, diameter, roughness, minor_loss, status) values ("{id}", "{node1}", "{node2}", {length}, {diameter}, {roughness}, {minor_loss}, "{status}");'
+
+    return delete_link(name, PIPE, id, sql, undo_sql)
+
+
+def get_pipe_ndoe1(name: str, id: str) -> str | None:
+    row = _get_pipe(name, id)
+    return float(row['node1']) if row != None else None
+
+
+def get_pipe_ndoe2(name: str, id: str) -> str | None:
+    row = _get_pipe(name, id)
+    return float(row['node2']) if row != None else None
+
+
+def get_pipe_length(name: str, id: str) -> float | None:
+    row = _get_pipe(name, id)
+    return float(row['length']) if row != None else None
+
+
+def get_pipe_diameter(name: str, id: str) -> float | None:
+    row = _get_pipe(name, id)
+    return float(row['diameter']) if row != None else None
+
+
+def get_pipe_roughness(name: str, id: str) -> float | None:
+    row = _get_pipe(name, id)
+    return float(row['roughness']) if row != None else None
+
+
+def get_pipe_minor_loss(name: str, id: str) -> float | None:
+    row = _get_pipe(name, id)
+    return float(row['minor_loss']) if row != None else None
+
+
+def get_pipe_status(name: str, id: str) -> str | None:
+    row = _get_pipe(name, id)
+    return float(row['status']) if row != None else None
+
+
+def _set_pipe(name: str, id: str, key: str, key_type: str, value: str, optional: bool = False) -> ChangeSet:
+    if not is_pipe(name, id):
+        return
+
+    row = _get_pipe(name, id)
+    if row == None:
+        return
+
+    return utility.update(name, PIPE, 'pipes', 'id', id, key, key_type, row[key], value, optional)
+
+
+def set_pipe_length(name: str, id: str, length: float) -> ChangeSet:
+    return _set_pipe(name, id, 'length', 'float', str(length))
+
+
+def set_pipe_diameter(name: str, id: str, diameter: float) -> ChangeSet:
+    return _set_pipe(name, id, 'diameter', 'float', str(diameter))
+
+
+def set_pipe_roughness(name: str, id: str, roughness: float) -> ChangeSet:
+    return _set_pipe(name, id, 'roughness', 'float', str(roughness))
+
+
+def set_pipe_minor_loss(name: str, id: str, minor_loss: float) -> ChangeSet:
+    return _set_pipe(name, id, 'minor_loss', 'float', str(minor_loss))
+
+
+def set_pipe_status(name: str, id: str, status: float) -> ChangeSet:
+    if status is not PIPE_STATUS_OPEN or status is not PIPE_STATUS_CLOSED or status is not PIPE_STATUS_CV:
+        return ChangeSet()
+
+    return _set_pipe(name, id, 'status', 'str', str(status))
diff --git a/script/sql/create/5.pipes.sql b/script/sql/create/5.pipes.sql
index cb04ea6..74c4982 100644
--- a/script/sql/create/5.pipes.sql
+++ b/script/sql/create/5.pipes.sql
@@ -1,6 +1,6 @@
 -- [PIPES]
 
-CREATE TYPE PIPES_STATUS AS ENUM ('OPEN', 'CLOSED', 'CV');
+CREATE TYPE PIPES_STATUS AS ENUM ('open', 'closed', 'cv');
 
 CREATE TABLE PIPES
 (