Z-FLEX 4" Z-Vent Concentric Vent Termination, 4" In 4" Out

Tankless water heater vent termination, designed for concentric venting. Specially engineered hood brings in air intake while allowing the vent to exhaust through the same termination. Features 4" Z-Vent Concentric Vent Termination is designed for use with tankless water heaters and high condensing boilers that bring in fresh air intake using a 4" port. (also available in other sizes/combinatons of exhaust and intake diameters).