diff --git a/pymodbus/client/tcp.py b/pymodbus/client/tcp.py
index a99700734..5b9478d59 100644
--- a/pymodbus/client/tcp.py
+++ b/pymodbus/client/tcp.py
@@ -47,6 +47,8 @@ def __init__(
         asyncio.Protocol.__init__(self)
         if "CommType" not in kwargs:
             kwargs["CommType"] = CommType.TCP
+        if source_address:
+            kwargs["source_address"] = source_address
         ModbusBaseClient.__init__(
             self,
             framer=framer,
diff --git a/pymodbus/transport/transport.py b/pymodbus/transport/transport.py
index 34eaa4796..170964e6c 100644
--- a/pymodbus/transport/transport.py
+++ b/pymodbus/transport/transport.py
@@ -37,7 +37,7 @@ class CommParams:
     timeout_connect: float = None
     host: str = "127.0.0.1"
     port: int = 0
-    source_address: tuple[str, int] = ("127.0.0.1", 0)
+    source_address: tuple[str, int] = ("0.0.0.0", 0)
     handle_local_echo: bool = False
 
     # tls