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Leaking Tankless Coil in a 45 yr-old Dunkirk/Delco DB525 Boiler

a tankless coil is a notoriously inefficient way to make hot water, especially in a 45 year old boiler. If you can swing it financially, now is the time to replace. A properly sized boiler and indirect will save you a lot of money over the long haul. As the saying goes, the boiler may last forever, but it's the technology that is really old. Go for it if you can.

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  • Len T
    Len T Member Posts: 1
    Time to replace a leaking tankless coil, or the entire boiler?

    My undersized 45-year old Dunkirk/Delco Boiler's Tankless Coil has a pinhole leak (diagnosed via pressure test by oil co. service mgr). After 2 wks, the system exceeds 30 lbs pressure, and the dual valve begins to leak.

    Will this condition worsen? Catastrophically fail?

    Options? (try to repair/replace the tankless coil? Install a new properly sized boiler (vs installing a Boilermate...my 50 gal Aero Storage tank is brand new).
  • Ken D.
    Ken D. Member Posts: 836

    Good advice is to replace with a new boiler. The efficiency is so much better. I like a low mass unit (or a 90 Plus if you go to gas) with an indirect water heater. You will realize a good return on your investment.
  • Guy_6
    Guy_6 Member Posts: 450

    Try this out- ask some of your friends and neighbors who have replaced their boiler in the past 5 years how they feel. You will get a resounding "I should have done it years ago".
    A new boiler with an indirect water heater will not only save you fuel, but deliver better heat and hot water while doing it.

This discussion has been closed.