The Double Wall B-Flex B-vent pipe can be used as both a flexible connector from a gas appliance to rigid B-vent and as a segment of B-vent, the company says. This pipe can be installed any place B-vent is needed except where pipe penetrates the structure at walls, floors, ceilings, and roof. It is ready to install immediately, with factory-assembled male and female twist-lock ends. According to the company, it gets rid of the need for measuring, special adapters, and assembly of rigid pipe and offers maximum flex without kinking. It is listed by UL to mate with a number of other UL-listed round gas-vent products, so it can be used with systems from a number of other manufacturers, the company says.
Metal-Fab, Inc., P.O. Box 1138, Wichita, KS 67201; 316-943-2351; 316-943-2717 (fax); www.mtlfab.com (website).