diff --git a/synapse/federation/__init__.py b/synapse/federation/__init__.py
index 979fdf2431..2e32d245ba 100644
--- a/synapse/federation/__init__.py
+++ b/synapse/federation/__init__.py
@@ -17,10 +17,9 @@
 """
 
 from .replication import ReplicationLayer
-from .transport.client import TransportLayerClient
 
 
-def initialize_http_replication(homeserver):
-    transport = TransportLayerClient(homeserver)
+def initialize_http_replication(hs):
+    transport = hs.get_federation_transport_client()
 
-    return ReplicationLayer(homeserver, transport)
+    return ReplicationLayer(hs, transport)
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index 9c69fe511c..0fe21ac8d7 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -18,7 +18,6 @@ from twisted.internet import defer
 
 from .federation_base import FederationBase
 from synapse.api.constants import Membership
-from .units import Edu
 
 from synapse.api.errors import (
     CodeMessageException, HttpResponseException, SynapseError,
diff --git a/synapse/federation/replication.py b/synapse/federation/replication.py
index 043baef13f..797c4bedbf 100644
--- a/synapse/federation/replication.py
+++ b/synapse/federation/replication.py
@@ -20,8 +20,6 @@ a given transport.
 from .federation_client import FederationClient
 from .federation_server import FederationServer
 
-from .transaction_queue import TransactionQueue
-
 from .persistence import TransactionActions
 
 import logging
@@ -66,7 +64,7 @@ class ReplicationLayer(FederationClient, FederationServer):
         self._clock = hs.get_clock()
 
         self.transaction_actions = TransactionActions(self.store)
-        self._transaction_queue = TransactionQueue(hs, transport_layer)
+        self._transaction_queue = hs.get_federation_sender()
 
         self.hs = hs
 
diff --git a/synapse/federation/transaction_queue.py b/synapse/federation/transaction_queue.py
index 69e01d6521..eb504055f8 100644
--- a/synapse/federation/transaction_queue.py
+++ b/synapse/federation/transaction_queue.py
@@ -44,13 +44,13 @@ class TransactionQueue(object):
     It batches pending PDUs into single transactions.
     """
 
-    def __init__(self, hs, transport_layer):
+    def __init__(self, hs):
         self.server_name = hs.hostname
 
         self.store = hs.get_datastore()
         self.transaction_actions = TransactionActions(self.store)
 
-        self.transport_layer = transport_layer
+        self.transport_layer = hs.get_federation_transport_client()
 
         self.clock = hs.get_clock()
 
diff --git a/synapse/server.py b/synapse/server.py
index 374124a147..faab617b4f 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -32,6 +32,8 @@ from synapse.appservice.scheduler import ApplicationServiceScheduler
 from synapse.crypto.keyring import Keyring
 from synapse.events.builder import EventBuilderFactory
 from synapse.federation import initialize_http_replication
+from synapse.federation.transport.client import TransportLayerClient
+from synapse.federation.transaction_queue import TransactionQueue
 from synapse.handlers import Handlers
 from synapse.handlers.appservice import ApplicationServicesHandler
 from synapse.handlers.auth import AuthHandler
@@ -124,6 +126,8 @@ class HomeServer(object):
         'http_client_context_factory',
         'simple_http_client',
         'media_repository',
+        'federation_transport_client',
+        'federation_sender',
     ]
 
     def __init__(self, hostname, **kwargs):
@@ -265,6 +269,12 @@ class HomeServer(object):
     def build_media_repository(self):
         return MediaRepository(self)
 
+    def build_federation_transport_client(self):
+        return TransportLayerClient(self)
+
+    def build_federation_sender(self):
+        return TransactionQueue(self)
+
     def remove_pusher(self, app_id, push_key, user_id):
         return self.get_pusherpool().remove_pusher(app_id, push_key, user_id)