yep true i ment to mention that about the big black ring and seal. its very easy to put that on on the wrong thread. did it myself but twigged it time before any damage was done few.......... about the pumps postion...... that yolk with the plugs and stuff where the pipes are attached is part of the bracket that hold the pump. its a long enough yolk but the pump is attached to it so when you lift it out the pump comes with it too. easy as