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The greatly reduced stack temperatures of modern 80%+ efficiency gas-fired heating equipment has made it possible to vent many fur- naces and boilers through stainless steel vent pipe. And, since the flue gases of higher efficiency combustion produce acidic condensate which rapidly deteriorate metal vent systems, the choice of an acid and corrosion resistant Z-Vent System, where recommended by the equipment manufacturer, is even more logical. Z-Vent is UL listed and is available in popular 3" and 4" diameter sizes.
Note: In order to comply with manufacturers' requirements for sidewall venting, Z-Vent III fitting connections are fitted with hi-temper- ature silicon gaskets. No need for additional sealant unless gaskets are torn. Always follow the equipment manufacturers instructions. AL29-4C® is a registered trademark of Allegheny Ludium Steel Corporation.