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RWT — 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.

How to Purchase

Vent FAQs

RWT — Wall Thimble

Assets/Details

Submittal Data (51 KB, PDF)
  • HC_RWT_drwProvides necessary clearance to combustibles.
  • Sleeve is adjustable from 3" to 6".

Wall Thimble dimensions (inches)

ModelSizeDim. ADim. BDim. C
3RWT3"5 1/2"3 1/16"3 9/16"
4RWT4"6 1/2"3 1/16"4 9/16"
5RWT5"7 1/2"3 1/16"5 9/16"
6RWT6"8 1/2"3 1/4"6 9/16"
7RWT7"10"3 1/4"8 1/16"
8RWT8"11"3 1/4"9 1/16"