How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
Is pipe insulation flammable?
Friday, December 7, 2018
The round foam pipe insulation with a slit on one side that is used most often in residential applications is polyethylene or neoprene, both of which are classified as combustible. Some formulations of the material may self-extinguish after a flame is removed from it, but that still puts it in the combustible category, which the code requires to be at least 6-inches away from a single-wall flue connector or 1-inch away from a Type-B connector above a gas furnace or water heater, unless otherwise indicated on the manufacturer’s data plate.
So, the insulation on the suction line coming out of an evaporator coil unit in photo above definitely should not be touching the single-wall flue connector.
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