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Thread: Moving vent Stack

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  1. #1
    DIY Senior Member nelsonba's Avatar
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    Default Moving vent Stack

    I need to move a vent stack. I'm having a plumber come out to reroute it, but I need to cut it off to make room for a header.

    1) Can I just cap the roof opening and leave the flashing? If so, what would I use to cap it off?

    2) If I support the vent stack at the floor with riser clamps set on floor joists, can I cut the stack with a reciprocating saw?

  2. #2
    Plumber patrick88's Avatar
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    Default

    2) If I support the vent stack at the floor with riser clamps set on floor joists, can I cut the stack with a reciprocating saw?

    Yes you can but I would still let a plumber do the work. I would not use a reciprocating saw it takes to long.
    I'm just starting to work with an old friend of mine to bring solar electric and hot water systems, wind turbines, Flex Fuel Boilers, batteries, hydroponic gardening, books, pellet grills and more. Also the parts for DIY installation.

  3. #3

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    I would remove the flashing and re-shingle over it.

    You don't say what kind of pipe - if it's plastic it's a breeze to cut with a recip saw - if it's cast iron, you need a special, expensive blade or a cast iron cutter.

    Last edited by Terry; 01-20-2008 at 09:35 AM.

  4. #4
    DIY Senior Member nelsonba's Avatar
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    Default Cast Iron

    Sorry. It's a cast iron pipe. There is also a joint halfway up to the roof. Could I take it apart there instead of cutting it and then take it apart at the floor? Here are a couple pics.

    http://picasaweb.google.com/barryjamesnelson/VentStack

    If so, what is the best way to disconnect the joint?

  5. #5
    DIY Senior Member nelsonba's Avatar
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    Default Anybody?

    Will a torch do it?

    And back to the flashing... It is the metal type with the piece that slides down from the top. Do they make caps for these? I don't want to mess around with patching the roof.

  6. #6
    Jack of all trades frenchie's Avatar
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    Default

    You can't cut that pipe with a sawzall. Well, not without a whole lotta misery, anyways. And a few hundred blades... seriously, you'll be there all day.

    I'd wait for the plumber; with his chain cutter, it'll take him less than a minute.

    Cutting it is also kind of dangerous. That stuff is HEAVY and somewhat brittle. If it isn't supported, the top bit may come crashing down on you. Or though the ceiling below...

    It's a job best left to the relevant specialist, as well as a risk best covered by someone else's insurance.

    You could take that joint apart, I suppose, with a torch, and a lotta time, but then you'd still have to LIFT the top section out of the hub. It's HEAVY, and the bottom of it would be covered in molten lead while you tried to do this...
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