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Posted by Bob D. on July 08, 2005 at 12:54:24:
In Reply to: galvanize piping posted by jerome on July 07, 2005 at 21:21:13:
: I recently replaced galvanize piping which leads from my furnace to the ceiling support which then leads to my chimney. I connected the galvanize piping at multiple points but did not screw the connections or tape them and was wondering if anyone knew if this is a necessary step. Please let me know.
I think (and hope) perhaps you are talking about a galvanized sheet metal flue pipe, also called a chimney connector, and a few other regional names. I'm guessing you replaced it because the old stuff had rotted out, or fell off, or whatever. The "magic words" that the furnace manufacturer probably used in the original installation instructions were probably along the lines of "Joints between sections of connector piping must be fastened using sheet metal screws or other approved means." They don't tell you how many screws, or what size or a few other details. "Approved" means (again, usually) approved by the connector manufacturer, or the listing agency (like UL), or the local Authority Having Jurisdiction (Code or building inspector guy). Tape (like in duct tape) isn't a good idea because it kind of melts, stinks, and can actually catch fire. If you're not 100% comfortable with this stuff, try to get a reputable heating contractor or the local building inspector (this is not always a bad thing) to swing by and give you some guidance. It might cost a few bucks for his time, but you'll sleep better.
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