diff --git a/odoo/service/db.py b/odoo/service/db.py
index f79a2d4e35b..1af06084b05 100644
--- a/odoo/service/db.py
+++ b/odoo/service/db.py
@@ -4,6 +4,7 @@ import json
 import logging
 import os
 import shutil
+import subprocess
 import tempfile
 import threading
 import traceback
@@ -26,6 +27,7 @@ import odoo.sql_db
 import odoo.tools
 from odoo.sql_db import db_connect
 from odoo.release import version_info
+from odoo.tools import find_pg_tool, exec_pg_environ
 
 _logger = logging.getLogger(__name__)
 
@@ -229,8 +231,8 @@ def dump_db(db_name, stream, backup_format='zip'):
 
     _logger.info('DUMP DB: %s format %s', db_name, backup_format)
 
-    cmd = ['pg_dump', '--no-owner']
-    cmd.append(db_name)
+    cmd = [find_pg_tool('pg_dump'), '--no-owner', db_name]
+    env = exec_pg_environ()
 
     if backup_format == 'zip':
         with tempfile.TemporaryDirectory() as dump_dir:
@@ -242,7 +244,7 @@ def dump_db(db_name, stream, backup_format='zip'):
                 with db.cursor() as cr:
                     json.dump(dump_db_manifest(cr), fh, indent=4)
             cmd.insert(-1, '--file=' + os.path.join(dump_dir, 'dump.sql'))
-            odoo.tools.exec_pg_command(*cmd)
+            subprocess.run(cmd, env=env, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, check=True)
             if stream:
                 odoo.tools.osutil.zip_dir(dump_dir, stream, include_dir=False, fnct_sort=lambda file_name: file_name != 'dump.sql')
             else:
@@ -252,7 +254,7 @@ def dump_db(db_name, stream, backup_format='zip'):
                 return t
     else:
         cmd.insert(-1, '--format=c')
-        stdin, stdout = odoo.tools.exec_pg_command_pipe(*cmd)
+        stdout = subprocess.Popen(cmd, env=env, stdin=subprocess.DEVNULL, stdout=subprocess.PIPE).stdout
         if stream:
             shutil.copyfileobj(stdout, stream)
         else:
@@ -302,11 +304,13 @@ def restore_db(db, dump_file, copy=False):
             pg_cmd = 'pg_restore'
             pg_args = ['--no-owner', dump_file]
 
-        args = []
-        args.append('--dbname=' + db)
-        pg_args = args + pg_args
-
-        if odoo.tools.exec_pg_command(pg_cmd, *pg_args):
+        r = subprocess.run(
+            [find_pg_tool(pg_cmd), '--dbname=' + db, *pg_args],
+            env=exec_pg_environ(),
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.STDOUT,
+        )
+        if r.returncode != 0:
             raise Exception("Couldn't restore database")
 
         registry = odoo.modules.registry.Registry.new(db)
diff --git a/odoo/tools/misc.py b/odoo/tools/misc.py
index bd4afd40bbf..957527a9e82 100644
--- a/odoo/tools/misc.py
+++ b/odoo/tools/misc.py
@@ -74,6 +74,7 @@ def find_in_path(name):
     return which(name, path=os.pathsep.join(path))
 
 def _exec_pipe(prog, args, env=None):
+    warnings.warn("Since 16.0, just use `subprocess`.", DeprecationWarning, stacklevel=3)
     cmd = (prog,) + args
     # on win32, passing close_fds=True is not compatible
     # with redirecting std[in/err/out]
@@ -82,6 +83,7 @@ def _exec_pipe(prog, args, env=None):
     return pop.stdin, pop.stdout
 
 def exec_command_pipe(name, *args):
+    warnings.warn("Since 16.0, use `subprocess` directly.", DeprecationWarning, stacklevel=2)
     prog = find_in_path(name)
     if not prog:
         raise Exception('Command `%s` not found.' % name)
@@ -124,6 +126,7 @@ def exec_pg_environ():
     return env
 
 def exec_pg_command(name, *args):
+    warnings.warn("Since 16.0, use `subprocess` directly.", DeprecationWarning, stacklevel=2)
     prog = find_pg_tool(name)
     env = exec_pg_environ()
     with open(os.devnull) as dn:
@@ -133,6 +136,7 @@ def exec_pg_command(name, *args):
             raise Exception('Postgres subprocess %s error %s' % (args2, rc))
 
 def exec_pg_command_pipe(name, *args):
+    warnings.warn("Since 16.0, use `subprocess` directly.", DeprecationWarning, stacklevel=2)
     prog = find_pg_tool(name)
     env = exec_pg_environ()
     return _exec_pipe(prog, args, env)