3" or 4" Vent Termination Hood with backflow preventer.  A must for Eccotemp 40HI series models to prevent freezing air from coming back through the vent stack.

Features

• Simple Gasketed Connection- No Sealant Needed
• Features the Highest Pressure Rating in the Industry
• The Only Metallic Special Gas Vent you can Cut to Length On Site
• New Fusion Welded Pipe Seams for a Smoother Finish and Better Fit
• Compatible with all Types of Z-Flex Z-Vent
• Made of AL-294C Stainless Steel