Skip to navigation
OAR — Adapter (oval-to-round)

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

OAR — Adapter (oval-to-round)


  • Adapts from oval to lock-ring style round.


Oval-to-Round Adapter dimensions (inches)

ModelSizeDim. A
4OAR4"11 3/8"