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  1. #1
    Join Date
    Feb 2010
    Location
    Long Beach, CA
    Posts
    105

    Default Curious Water Heater Vent & Terminal

    I've not seen this gas appliance vent terminal before. The manufacture's web site offers little info. The Cat 1 water heater in the garage uses a 2-foot or so single wall vent connector that transitions to a vertical B-vent run which enters the exposed wood framing flooring overhead where the pipe transitions back to single wall and disappears. The vent pipe is thn routed up a 2nd level chimney chase where it exits the wall as pictured. This seems to be have a single wall collar, no thimble, likely single wall pipe in the wall...anyone seen this before? Of course, all in all--it looks completely wrong.

    Thanks

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  2. #2
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
    3,746

    Default Re: Curious Water Heater Vent & Terminal

    As you know, single wall should not pass through walls, floors, attics, or roofs.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  3. #3
    Join Date
    Aug 2011
    Location
    Bennett (Denver metro), Colorado
    Posts
    1,394

    Default Re: Curious Water Heater Vent & Terminal

    Quote Originally Posted by Rick Cantrell View Post
    As you know, single wall should not pass through walls, floors, attics, or roofs.
    And you can't neck down from a larger flue to a smaller.

    If you choose not to decide, you still have made a choice.

  4. #4
    Join Date
    Mar 2007
    Location
    Near Philly, Pa.
    Posts
    1,643

    Default Re: Curious Water Heater Vent & Terminal

    CAT I appliances must terminate vertically unless power vented by sidewall.

    This appears to be Al29-4C stainless steel special gas vent for CAT III & IV appliance venting. It is single walled uninsulated and not intended for CAT I venting. There is no approved way to attach it to the Bvent since it is not intended for this application. It is all wrong.

    Keep the fire in the fireplace.

  5. #5
    Join Date
    Feb 2010
    Location
    Long Beach, CA
    Posts
    105

    Default Re: Curious Water Heater Vent & Terminal

    It's crazy wrong...thanks!


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