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ET — Reducing Tees

How to Specify

Using tables from the National Fuel Gas Code or our Sizing & Application Guide, determine the diameter of venting required. The Sizing & Application Guide also offers tips on good design including multi-appliance system sizing and design. The System Design and Installation Guide is an additional resource.

Amerivent FAQs

ET — Reducing Tees

The reducing tee features a branch with a smaller diameter than its trunk size, and provides a convenient connection of the furnace and water heater to a common vent.

Available sizes (inches)

ModelTeeBranch
4ET-34"3"
5ET-35"3"
5ET-35"4"
6ET-36"3"
6ET-46"4"
6ET-56"5"