Yes! Indeed we are going to have a nice integrated re-circ fitting / port near to top of our 20 gal MT! Oh and think we'll try to do a nice custom manifold for it while we're at it. Pretty sure the manifold will be an optional part we sell as an accessory. But the HERMS/RIMS re-circ port on the MT itself will just a standard feature of this 20 gal unit.