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Is PVC an acceptable vent material for flue gases?
An excellent article on this subject by Ron George in the May 2011 Plumbing Engineer Magazine. He supports with his findings many of the things i have posted here. Read the article if you can it will open your eyes to this dangerous practice.
Ron is President of Plumb-Tech Design and Consulting Services LLC. He has served as chairman of the International Residential Plumbing and Mechanical Code Committee. Visit www.plumb-techllc.com his e-,mail is firstname.lastname@example.org or phone 734-755-1908.