I have read all posts I could find on this but didn't see an answer. The one answer I found had an outdated link. I have the Sagonaw "square" pump. I have had a persistant leak since it was purchased new. I re-did the "plumbing" twice. Still leaked. I exchanged it for another "new" reman. pump and want to install install it once. Are there O rings that belong inside the male pressure line? Should I use teflon tape as well on all threads? The motor is all new so my components are not original, therefore, I have no reference. Thanks for any responses, I'm out of ideas.