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HS-WTP — Wall Thimble

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.

HS-WTP — Wall Thimble


Submittal Data (53 KB, PDF)

The Wall Thimble is used with a tee branch and chimney section to provide proper clearance to combustible materials. The black painted surface for an interior wall eliminates the need for a trim plate.AV_pg8 AV HS-WTP Wall Thimble prod dim

Available sizes (inches)

Part No.SizeABCD
6HS-WTP6"9"13"18"Adjustable from 4 1/2" to 8"
8HS-WTP8"11"15"18"Adjustable from 4 1/2" to 8"