This rigid chimney liner system was designed to increase the efficiency of an existing chimney and avoid the expense of carrying out minor repairs. Also, the product can correct the occasional problem of existing chimneys lacking the correct flue size for the heating appliance. A snap connection pipe makes installation quick and easy. No clamps or screws are required.

Z-Flex Inc., (800) 654-5600; fax (603) 669-0309.

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• Z-Flex Inc.