water heater vent stack

Discussion in 'Water Heater Forum, Tanks' started by fozzy12, Jan 28, 2009.

  1. fozzy12

    fozzy12 New Member

    Joined:
    Jan 31, 2008
    Occupation:
    quality manager
    Location:
    North of Detroit, MI
    I'm running a standard water heater in my garage. It's a 75 gal Brad White with a 4" vent. Do I need to run double insulated vent piping? I temporarily put it in with standard 4 inch vent, through a roof flashing with a storm collar and a cap. I'm getting it inspected and rather going through having it fail, I'd rather change it sooner than later. I have ample clearance where it passes through the roof and also through the second floor flooring.
    I'm in Michigan if that helps.

    Thanks

    Eric
     
  2. jimbo

    jimbo Plumber

    Joined:
    Aug 31, 2004
    Location:
    San Diego
    At every point, including the roof, you must have 6" clearance in all directions to any piece of wood or drywall or other combustible material.
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    vent

    Why would you even take a chance with single wall? Use double wall from the ceiling to the vent cap.
     
  5. fozzy12

    fozzy12 New Member

    Joined:
    Jan 31, 2008
    Occupation:
    quality manager
    Location:
    North of Detroit, MI
    HJ,
    It wasn't a question of taking a chance with single wall, I didn't know any better. I assumed since the heater had a normal 4 inch stack on top of it, that single wall would be acceptable, leaving enough clearance around the pipe. Since I have found out differently from the inspector who was kind enough to return my phone call, I will be changing it out to double wall tomorrow. It will be inspected, I just wanted it to pass on the first inspection.

    Eric
     
  6. SewerRatz

    SewerRatz Illinois Licensed Plumber

    Joined:
    Nov 20, 2008
    Occupation:
    Chicago Illinois Licensed Plumber
    Location:
    Chicago, IL
    It is awsome that you are having this inspected. I was just wondering did you install this heater on an 18" stand?
     
  7. nhmaster

    nhmaster Master Plumber

    Joined:
    Jul 30, 2008
    Occupation:
    Tech. Instructor
    Location:
    S. Maine
     
  8. fozzy12

    fozzy12 New Member

    Joined:
    Jan 31, 2008
    Occupation:
    quality manager
    Location:
    North of Detroit, MI
    NH,
    Sorry to disappoint you on the wrench throwing, it is installed on an 18 inch pedestal!

    Eric
     
  9. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    heater

    It only needs to be on a stand if it is in the garage. If the city has accepted the latest National Gas Code, and the heater has an FVIR burner, it only has to be on the stand if a car could impact it.
     
  10. fozzy12

    fozzy12 New Member

    Joined:
    Jan 31, 2008
    Occupation:
    quality manager
    Location:
    North of Detroit, MI
    HJ
    The water heater is in a separate building but since it has garage doors on it, it needs to be on a pedestal. Here it also needs to be protected from impact. That means either 4 inch steel posts filled with concrete, or a wall. I chose the wall, I planned on it anyway. It is an older heater so it doesn't have the newer burner that can sit on the floor.

    Eric
     
  11. SewerRatz

    SewerRatz Illinois Licensed Plumber

    Joined:
    Nov 20, 2008
    Occupation:
    Chicago Illinois Licensed Plumber
    Location:
    Chicago, IL
     
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