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EZTR – Am I required to use the Aluminum Flex Sleeve?

Yes. The system is designed to minimize the chances of an exhaust leak by making use of negative pressure inside the unit should there be an exhaust leak. Further, it is designed to work as a protective sleeve that shields the Flex Pipe from impact and in situations where the pipe becomes hot.
 
 See item 8 in the venting diagram below.

Updated on April 14, 2021

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