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  1. #1
    Join Date
    Dec 2005
    Posts
    4
    Home inspector cited the following as a code violation saying the wye pipe for the furnace and water heater is too close to the header above a pair of bifold doors. Said the single wall pipe should be replace with double wall.

    Here are some pics. House is 13 years old and has a 2 year old Bryant 80% unit and new Rudd water heater. Basement was finished sometime after the house was originally built.

    Can I simply go to Home Depot and pick up a double wall wye pipe? Does this have to be a B Vent?

    Thanks.




  2. #2
    Join Date
    Apr 2004
    Posts
    7,680
    First off, it should be double wall anyway and second you need a minimum of 6" clearance to single wall pipe to combustables.

  3. #3
    Join Date
    Sep 2004
    Location
    Memphis
    Posts
    2,502
    Your going to have trouble finding a double wall wye at home depot. I would be calling the company that put the furnace in if its only 2 years old. When we install a furnace, we bring the whole setup up to code. & if that means replacing the vent pipe (which it usually does) then its included.
    Life is like a jar of jalapenos. What you do today might burn your ass tomorrow.

  4. #4
    Join Date
    Dec 2005
    Posts
    4
    I called the contractor back who put the furnace in two years ago (large outfit in the Pittsburgh Area). They're telling me that in a controlled space it only needs 1" minimum clearance for single wall pipe. They also said the max temp the vent gas reaches on my unit is 250F...more like 190F typically. They said that they would have replaced the pipe during install if it was necessary.

    Anyway, could the 1" deal be some sort of local code to this area. Or should I be calling another contractor?

  5. #5
    Join Date
    Sep 2004
    Location
    Memphis
    Posts
    2,502
    In our area a double wall pipe requires a 1 inch clearance. Doc said that you needed a 6 inch clearance for single wall. I know nothing about the clearance for a single wall because we're never allowed to do it.

    If the home inspector is raising this question then the hvac company should be able to give you a letter saying they did it according to code & that everything is ok.
    Life is like a jar of jalapenos. What you do today might burn your ass tomorrow.

  6. #6
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,981
    To reiterate; should be "B" vent all the way to the furnace. This would satisfy the code for clearances and the need to keep the flue gases as warm as possible to aid the function of the furnace.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  7. #7
    Join Date
    Oct 2003
    Posts
    2,866
    It doesnt look like you have a 1 in clearance in the picture. Might be time for the city or county inspections dept. You wont have any trouble getting it taken care of if they get involved. Was it ever inspected is a good question.

  8. #8
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,607
    National Fuel Gas Code says single wall must be 6" to combustibles. Call your city inspector's office and see what they say. If they agree, ask them to inspect the job and see if the work passes.

  9. #9
    Join Date
    Dec 2005
    Posts
    4
    I'm having a new HVAC contractor come out later in the week to do an annual service on the furnace and inspect the vent piping. I've done some research and found that they make flexible B vent pipe. It looks to me like it would be very easy to get rid of all the rigid pipe between the furnance / water heater and the main vertical stack that goes through the first floor. That isn't pictured above but it is B pipe with a fire stop. A new B wye pipe and some flex B pipe should allow everything to be placed further to the left in the top picture and well away from everything.

    Thanks for the replies!

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