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Burnham V-74-T boiler leaking

Jim_26 Member Posts: 2
I have a Burnham V-74-T, CI, oil fired, hot water boiler that is leaking,... But it appears to only leak when the burner is firing. The combustion chamber liner appears to be in good shape, there was about a cup of what I assume was ash but looked like rust on the liner.
I assume the heat from the firebox is causing a crack to expand and leak. I cooled the boiler down to try to see where the leak was (with the boiler cooled off the leaking water would not evaporate as fast and I hoped would be easier to find). It did not leak, even with about 25psi. When I started the burner, I could see it dripping under the boiler after about 2-3 minutes of firing.
I assume the leak is in one of the sections. It is dry in the areas where the slip nipples are, as well as at the tankless heater gasket, and there are no valve stems dripping, etc...
The boiler is 8 years old.
Has anyone seen this before? Could this be a defect in the casting? Could this be a warranty issue?
Any comments would be appreciated.


  • Mark Wolff
    Mark Wolff Member Posts: 256

    Even if it was a defect in the casting or a design error, the warranty would not apply, it is past its warranty period. I have never seen a problem like this, I'll be watching to see what Glenn Stanton might say.
  • Mad Dog
    Mad Dog Member Posts: 2,595
    I Believe the V-7 Series had some problems ...and the V-8

    replaced it. Glenn will fill you in. Mad Dog

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Contractor"
  • Fred Harwood
    Fred Harwood Member Posts: 261
    leaking boilers

    Any serial number ranges on this problem?
  • Robert O'Connor_3
    Robert O'Connor_3 Member Posts: 272
    To verify warranty

    contact our Customer Service Department with the Serial Number of the boiler at (888)432-8887. They will advise you on the correct procedure and whether the boiler is under warranty. Hope this helps.

    Glenn Stanton

    Burnham Hydronics
  • Radiant Wizard
    Radiant Wizard Member Posts: 159
    V7 Leakers

    It's leaking at the second section. Right now we are getting atleast 1 replacement block a week for the V7. Like Glenn stated in his post. Call the 1-800 number, they will send you a new block with jacket. You will have to take the burner and trim off your current boiler though. They will also give you a labor allowance.

    Yes they did have a problem

    Best of Luck
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