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TLCT — Insulated Tee With Tee Cap

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.

TLCT — Insulated Tee With Tee Cap


  • The insulated chimney tee may be used for through-the-wall installation, using awall support.
  • A chimney length is required to pass safely through a wall.
  • Includes the following:
    • Two locking bands
    • 5” to 8” sizes have an uninsulated (single-wall) twist-lock tee cap for non-wall support applications only.
    • 10” to 14” sizes have an insulated press fit tee cap.

    AV_TLCT_Insulated Tee with Tee Cap

ModelSizeOD AID BHeight CDE
5TLCT5"7510 1/455
6TLCT6"8611 1/45 1/25 1/2
7TLCT7"9712 1/466
8TLCT8"10813 1/46 1/26 1/2
10TLCT10"121016 3/48 3/88 3/8
12TLCT12"141218 3/49 3/89 3/8
14TLCT14"161430 3/410 3/810 3/8