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OBC — Tee Support

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.

How to Purchase

Vent FAQs

OBC — Tee Support


  • The tee support is used to support and center the tee. Use with the tee cap shown below.

Tee Support dimensions (inches)

ModelSizeDim. ADim. B
4OBC4"3"11 1/2"
5OBC5"3"12 7/8"