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  1. kbgx2 New Member

    joined: Jan 19, 2008
    7 posts
    north,GA
    I am going to be putting my 3inch vent pipe for my pellet heater through the 8inch poured wall fondation will I still need a thimble? THANKS
    #1

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  2. hearthtools Super Moderator

    Thimble would make is a cleaner looking installation
    but if it is solid concrete you dont need it but you do need something to fill around and a thimble would do the trick
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