On Sat, 7 Sep 2013 18:22:28 -0700 (PDT), Mikepier
wrote in
Re How to
properly vent 2 gas water heaters:

I have a 75 gal water heater with a 4 " vent going into a chimney. If I wanted to add a second water heater, what would be the proper way to vent both into the same pipe? Could I just add a Y and vent both through the same pipe going into the chimney?

That will work.

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