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FCY — 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

FCY — Wyes

Assets/Details

The branch, trunk, and base diameters of the standard single-wall wye are the same size.The reduction single-wall wye features a branch and/or base with a diameter smaller than the trunk size. Convenient connection for furnace and water heater into a common connector.AV_FCY_VC line drawing wyes

Available sizes (inches)

ModelSizeABCD
4FCY34"41/2"31/2"41/2"9"
4FCY-334"4 1/2"3 1/2"3 1/2"12"
5FCY-345"5 1/2"3 1/2"4 1/2"12"
5FCY-445"5 1/2"4 1/2"4 1/2"13 1/2"
5FCY-435"5 1/2"4 1/2"3 1/2"13 1/2"

Standard Single-Wall Wye

The branch, trunk, and base diameters of the standard single-wall wye are the same size.

Available sizes (inches)

ModelSizeABCD
3FCY3"3 1/2"3 1/2"3 1/2"9"
4FCY4"4 1/2"4 1/2"4 1/2"10 1/2"