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Elbows on Line to Main Vent
I'm in the process of replacing my 78 year-old Gorton 1s with new Gorton 2s, as per the prior recommendation of this board. However, now that I've taken down the sheetrock around the second main vent, it turns out the Gorton 1 is directly underneath a joist and the Gorton 2 won't fit in the space. Can I attach an elbow-coupler-elbow to bring it around the side of the joist and install it there? Or will that ruin something?