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OEF45 — Elbow (flat)

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

OEF45 — Elbow (flat)


  • The flat 45° elbow is used in pairs where offsets are desired in 1" minimum clearance enclosures or open spaces, such as attics or basements. Add pipe sections between pairs to produce additional offset.

HC_OEF45_TBGV line art 45-degree elbow-flat

Flat 45° Elbow dimensions (inches)

ModelSizeDim. ADim. B
4OEF454"3 3/4"3 3/4"
5OEF455"4 3/4"4 3/4"