Skip to navigation
OT — Standard Oval Tee

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

OT — Standard Oval Tee


  • HC_OT_TBGV line art tee ovalThe branch size and trunk size have the same effective area. The tee branch accepts either double- or single-wall pipe.

Standard Oval Tee dimensions (inches)

ModelSizeDim. ADim. BDim. C
4OT4122 9/162 3/8
5OT5122 9/162 3/8