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EY — Standard and Reduction Wyes

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

EY — Standard and Reduction Wyes

Standard Wye

The standard wye features the branch, trunk, and base diameter with the same size.

Reduction Wye

The reduction wye features a branch and/or base with a smaller diameter than the trunk size, and provides a convenient double-wall connection to furnace or water heater in a common connector.AV_EY_TBGV line art wyes

Available sizes (inches)

ModelSizeABCD
4EY4"4 1/2"4 1/2"4 1/2"9"
4EY-34"4 1/2"3 1/2"4 1/2"9
5EY-35"5 1/2"3 1/2"5 1/2"9"
5EY-45"5 1/2"4 1/2"5 1/2"10 1/2"
5EY-335"5 1/2"3 1/2"3 1/2"12"
5EY-345"5 1/2"3 1/2"4 1/2"12"
5EY-435"5 1/2"4 1/2"3 1/2"13 1/2"
5EY-445"5 1/2"4 1/2"4 1/2"13 1/2"
6EY-36"6 1/2"3 1/2"6 1/2"9"
6EY-46"6 1/2"4 1/2"6 1/2"10 1/2"
6EY-56"6 1/2"5 1/2"6 1/2"12"