RIP buderus st150

hpap

Installed Nov 2001, noticed discoloration yesterday, opened service hatch this morning and found a mess

hpap

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

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

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

No hole in exchanger

But 19 years is a good run

TAG

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

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

I think you're the poster boy for Pro Press.

mattmia2

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

Running at a high temperature more mineral come out of solution .. If not leaking I would just flush it out

hpap

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

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

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

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.

MikeAmann

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

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

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.