Metal-Fab Type B Round Chimney Pipe Length - 4" x 18" - 4M18

This Type B-vent vent pipe can be used to vent Category I appliances like gas-fired boilers, furnaces, fireplaces and water heaters. The dual wall construction with its 1/4" insulating air space means that you can install this pipe with a 1" clearance to combustible materials. Dangerous sharp edges are eliminated by the hemmed flue and casing, and the SureLock system makes connection easy and secure without the need of tools. This item will work with other brands of 4" UL listed round gas vent pipe. There is a limited 1-year warranty. This part is listed to UL 441.

• Effectively vents Category I appliances such as gas-fired fireplaces, furnaces, water heaters, and boilers
• .018" galvanized steel outer wall and .012" aluminum alloy inner wall
• 1/4" insulating air space
• Double-wall design allows a 1" clearance to combustibles
• SureLock locking system creates secure connections without tools
• Hemmed flue and casing eliminate sharp edges
• Compatible with other brands of 4" UL Listed round gas vent pipe (see list below)
• Listed to UL 441
• Limited one-year warranty
• Approximate Dimensions: 4" inner diameter x 18" L

Compatible with the following brands of Type B gas vent pipe:

• General Products Co. - Airjet
• American Metal Products Co. - Amerivent
• Hart & Cooley - Metlvent
• Household Manufacturing Inc. - Metalbestos and Airmate
• Mitchell Metal Products Inc. - Mitchvent
• Selkirk Metalbestos - Metalbestos
• Simpson Dura-Vent Inc. - DuraVent
• ECCO Heating Products - ECCO Manufacturing