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RIP buderus st150

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hpap
hpap Member Posts: 10
in Domestic Hot Water
Installed Nov 2001, noticed discoloration yesterday, opened service hatch this morning and found a mess



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  • hpap
    hpap Member Posts: 10
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    Now here's a interesting happening I'd thought to share here.

    I first noticed the discoloration in the master bedroom bathroom on hot side of sinks and tub, but nothing in others bathroom's or kitchen.

    The master bedroom was addition circa 2004 and I used aqua pex for the project. The rest of house is plumbed in copper, house built in 2000.

    Why no discoloration from copper supplied sinks ??

    Thanks
  • HVACNUT
    HVACNUT Member Posts: 5,835
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    What's your water quality?
    That's why the access cover and anoid rod are there. Was the tank inspected/cleaned at least bi annually?
    19 years isn't too bad, and it's not dead. No hole in the HX?
  • hpap
    hpap Member Posts: 10
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    Started life for 5 years with South Jersey pinelands acid water

    Then city water came in

    I'll be honest

    It's first time I had open

    Next one will get better attention
  • hpap
    hpap Member Posts: 10
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    No hole in exchanger

    But 19 years is a good run
  • TAG
    TAG Member Posts: 755
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    Mine looks like a huge diving bell on three legs -- very heavy .. put them in around 94. One failed a few years ago the other is still going. I replaced it with the Buderus SS unit -- has the proper well for the sensor
  • hpap
    hpap Member Posts: 10
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    Install of the new st2oo complete
    A new old stock st200
    I bought it back in 2005 to replace the st150 for better capacity for a whirlpool tub, never got Around to it lol.

    Completion celebrated appropriately with a rauchbier also from Germany

    Ok, a few rauchbier s !!

    I think the control card for the electronic anode rod failed, I turned the top around so I can monitor the green light.



  • HVACNUT
    HVACNUT Member Posts: 5,835
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    I think you're the poster boy for Pro Press.
    hpap
  • mattmia2
    mattmia2 Member Posts: 9,646
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    The electronic anode could be doing its job and that is just iron and other minerals from the water. Might be fine for another decade or 2 with a good cleaning.
  • Big Ed_4
    Big Ed_4 Member Posts: 2,785
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    Running at a high temperature more mineral come out of solution .. If not leaking I would just flush it out
    I have enough experience to know , that I dont know it all
    MikeAmann
  • hpap
    hpap Member Posts: 10
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    The thermo glaze is all but gone in the tank

    Only glaze I found was outside the gasket on tank access cover

    I ordered extra anode rod and gasket s
    I LL def keep watch on it

    I'm getting to old for another change in 20 years lol
  • Henry
    Henry Member Posts: 998
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    Does anybody read the instructions for hot water tanks? You have to flush the tank once a year. I discussed HWT failures with my friend who is a technical director for a a tank manufacturer due to insurance companies requiring tank replacement after 10 years. A hot water tank whether electric, gas or indirect depending on water quality will last over 20 years. My previous tank lasted from 1985 to 2014. I have now a HTP S/S modulating gas HWT that will outlast me and saves me over $300 in gas each year.
    hpap
  • hpap
    hpap Member Posts: 10
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    Hi everyone

    Checked new st 200 today, anode rod gone after 2 1/2 years, replaced, washed tank out, now anode monitor flashing red 
  • hot_rod
    hot_rod Member Posts: 22,143
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    That Buderus was a nice tank with the large handhole. You could point a pressure washer inside them.
    I suspect many never get opened and flushed.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    MikeAmann
  • MikeAmann
    MikeAmann Member Posts: 997
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    You might want to look into a powered titanium anode. It does not get consumed in the process.
    Therefore no deposits to build up in the tank. An electronic circuit does all the work.
    https://www.ebay.com/itm/142271777319?_trkparms=amclksrc=ITM&aid=1110006&algo=HOMESPLICE.SIM&ao=1&asc=20200818142401&meid=2e4a60c08484403396073f417b3ddb5a&pid=101124&rk=5&rkt=12&sd=175362282626&itm=142271777319&pmt=0&noa=1&pg=2563228&algv=DefaultOrganicWeb&brand=TEC&_trksid=p2563228.c101124.m2109
  • hpap
    hpap Member Posts: 10
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    The ST would probably last "forever" if maintained every 2 years. 
    The hand hole as on a commercial boiler makes it easy.

     Now to sort out why red light on anode monitor is flashing

  • TAG
    TAG Member Posts: 755
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    How does the Anode monitor work?

    Since this initial post my the second Buderus tank failed .... not bad for 28 years. Replaced with another of the SS tanks -- wish they had a temp gauge like the old ones.

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