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Multiple vents in chimney

Mike Lamb

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The masonry chimney flue has become a chase for added vents, so they're not technically sharing a flue.  

The big problem is that's probably an uninsulated single-wall metal flue liner, so there's clearance issues to the PVC vent pipes.  Also, the metal liner is not secured with a proper collar and the cap isn't attached with a proper fitting.

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