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Triangle Tube combustion vent pipe failures

smklinsmklin Posts: 66Member
Does anyone have any issues with their triangle tube boilers combustion vent pipe splitting open and cracking

Comments

  • unclejohnunclejohn Posts: 1,223Member
    Mine is fine. I have replace one and I believe it was leaking at the bottom. That pipe was metal and the replacement was plastic. Are you having multiple failures?
  • smklinsmklin Posts: 66Member
    yes I have a total of 11 boilers and the hotter the working temp the worse it gets all of them will need to be replaced within a year
  • PVC or CPVC pipe?
    Often wrong, never in doubt.
  • unclejohnunclejohn Posts: 1,223Member
    Your talking about the vent pipe inside the boiler correct?
  • kcoppkcopp Posts: 3,026Member
    Which model? LP or Nat gas?
  • DZoroDZoro Posts: 283Member
    What sizes? Concentric vent?
  • smklinsmklin Posts: 66Member
    the boilers I have are solo 250 and solo 175
    no its not concentric vent the vent are about 5 feet till they terminate the buildings
    its natural gas
    the pipe that's cracking is the flue gas pipe inside the boiler
    and I believe its a polypropylene pipe
    https://www.supplyhouse.com/Triangle-Tube-PTRKIT116-Vent-Pipe-for-Solo-175-250-Trimax-Boilers-only
  • unclejohnunclejohn Posts: 1,223Member

    This product is only compatible with boilers which have a Trimax Control.

    Vent Pipe - polypropylene (for Solo 175-250 Boilers)

    NOTE: Please do not call the manufacturer, Triangle Tube, with questions about this product. If you have questions (technical or otherwise), please call customer service at 1-888-757-4774 and a customer service representative will be happy to assist you.

    Don't get me wrong I buy from Supply House but this tells me that you should be calling TT and talking to them. If there is a real problem with their stuff they will fix it.
  • kcoppkcopp Posts: 3,026Member
    That's disconcerting... especially where we have been told/ fed that pvc is not good for venting boilers.
    There are a lot of boilers/ mfg that use PP for the first leg going out of the combustion chamber.
    What are you seeing for flue/ stack temps?
    Got any pix?
  • smklinsmklin Posts: 66Member
    I am dealing with triangle tube and it seams they are working with me .I am just wondering if this is a common problem.as far as supply house I don't buy from them .Was just a link to clarify what I was referring to.
  • smklinsmklin Posts: 66Member
    yes I have pic how do I post them
  • kcoppkcopp Posts: 3,026Member
    On the leave a comment section there is an icon above where you type.... 3rd from the right
  • ZmanZman Posts: 3,985Member
    The older TT's has stainless vents. They switched to poly when they introduced the Trimax model. If I remember correctly they claimed that they had had issues with something corrosive leaching from the PVC vent piping in the US market.
    Keep us posted on this one.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Mark EathertonMark Eatherton Posts: 5,819Member
    Sounds like a major recall in the wings to me...

    ME
    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
  • Solid_Fuel_ManSolid_Fuel_Man Posts: 893Member
    Silly (loaded) question: Is PVC allowed as venting in other parts of the world?
    Master electrician specialising in boiler and burner controls, multiple fuel systems, radiant system controls, building controls, and universal refrigeration tech.
  • kcoppkcopp Posts: 3,026Member
    Still like to see a picture.....
  • smklinsmklin Posts: 66Member
  • Mark EathertonMark Eatherton Posts: 5,819Member
    edited April 13
    Wow, that's for sure a failure. Not sure what caused it, but it is breached...

    To the other person who asked where else PVC is allowed, anywhere that they accept the manufacturers installation instructions, including Canada. The PVC manufacturers can make any claims they want about incompatibility, but the bottom line is, it's the boiler manufacturers who carry the liability, and they have done their research and have approved it for installation with their equipment.

    I've never seen PVC fail like that.

    ME
    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
  • smklinsmklin Posts: 66Member
    I talked to triangle tube and they said they suspect that it comes from over firing I went and checked the combustion on all the boilers that failed like that and not one was the oxygen level over what the book said as far as the high limit .The high and low fire was not within + or - .2 but was not that far out of range ??????
  • Solid_Fuel_ManSolid_Fuel_Man Posts: 893Member
    Hmmm, that looks a lot like the W-M 97+/ECO inside. That same PP base and pipe too.
    Master electrician specialising in boiler and burner controls, multiple fuel systems, radiant system controls, building controls, and universal refrigeration tech.
  • kcoppkcopp Posts: 3,026Member
    What did you do to repair it?
  • DZoroDZoro Posts: 283Member
    Over firing, BS, Then their flue sensor or other safeties should have shut down the boiler.
    My personal feelings on their boilers is that they do not have good safeties implemented with their boiler operation. Have seen a few dangerous issues with the boiler over the past 14 or so years.

    But I'm just a heating guy, no engineer here.
    D
  • smklinsmklin Posts: 66Member
    Nothing yet I am waiting for my supplier to get me the parts .These boilers are less than 6 years old .And it seams that the hotter the design temperature the worse it gets. They drill a whole in the flue pipe and install the flue sensor there it seams they start to crack there .On the new flue pipes they install some bushing type deal there to put the flue sensor in there.
  • smklinsmklin Posts: 66Member
    something else I noticed that the boiler will not keep its combustion analysis if you go and fine tune it to triangle tubes spec (have called in to there tech line and set the boiler to there liking ) it will not keep the combustion for let say a few months
  • ZmanZman Posts: 3,985Member
    Years ago I worked with a guy we called "too tight Charlie" If a pipe needed a 1 3/8" hole, he would shove it into a 1". If a cooktop instruction said to make the opening 30 1/4", he would cram it into a 30" opening and wonder why the counter top cracked when the stove heated up. I haven't seen Charlie in years, I wonder if he went to work for Triangle Tube.

    How much are your combustion numbers wandering around? The difference in temperature of the combustion air will effect the numbers quite a bit
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Mark EathertonMark Eatherton Posts: 5,819Member
    edited April 14
    Zman said:

    Years ago I worked with a guy we called "too tight Charlie" If a pipe needed a 1 3/8" hole, he would shove it into a 1". If a cooktop instruction said to make the opening 30 1/4", he would cram it into a 30" opening and wonder why the counter top cracked when the stove heated up. I haven't seen Charlie in years, I wonder if he went to work for Triangle Tube.

    How much are your combustion numbers wandering around? The difference in temperature of the combustion air will effect the numbers quite a bit

    And atmospheric pressure, and humidity, and solids in suspension (sheet rock dust) and, and, and,.

    In reality, the combustion analysis is only valid for THAT second in time, under THOSE operating conditions. Kind of like a stopped clock being correct 2 times per day...

    But NOT doing an analysis is more dangerous than doing one and having those conditions change in the field. DO THE ANALYSIS.

    ME

    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
  • rick in Alaskarick in Alaska Posts: 691Member
    That looks more like Polypropylene pipe. Is it?
    Rick
  • tim smithtim smith Posts: 2,246Member
    edited April 16
    It would be good to clock meter in high and low fire, would be interesting to see if overfired. Also with water temp all the way up to max, in high fire, what is your flue temp. All of the above would be good to know. Sorry to see this, I have quite a few TTs out there. Other possibility is if there is a hole in the burner but I would think you would pickup on combustion readings.
    Tim
  • hot rodhot rod Posts: 7,927Member
    it does look like PP, not PVC?

    PP is rated to 235F. When boilers get dirty flue temperature goes up. But sensors should protect against excessive temperature
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • smklinsmklin Posts: 66Member
    I would say that the low fire was lower by average -.5 tents one was quit a bit more there were some of the boilers that were within + or - .2 tentswich is what tt wants they were all within range of what the book says as far as max oxygen level even the ones that were + or - .2 tents cracked .These boilers do high temp baseboard 160 degrees and domestic hot water were the boiler side of the domestic water is set at 160 degree .
  • smklinsmklin Posts: 66Member
    on another note these boilers never get up to 235 degrees flue temp they never go to 180
  • Big EdBig Ed Posts: 1,046Member
    Is the outdoor reset hooked up ?
    I have enough experience to know , that I dont know it all
  • smklinsmklin Posts: 66Member
    yes its hooked up the boilers have a max temp of 160 degree + or - a few
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