
Cast iron boiler piping help
I have a Weil McLain cast iron boiler I’m going to add a indirect to.
I currently have a single circ split loop and was thinking while I’m at it create separate heating zones for those areas as well.
I keep reading about condensate protection using 3-way mixing valve and have been considering adding one while I’m doing the re-pipe.
*note there will be expansion tank,isolators, and fill/drains not shown in sketch.
Any input would be appreciated!