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i am flushing the system. not installing a pump.

please excuse the miscommunication.

The boiler may be fine but the original installer created a big mess. Looks like crap.

ah a floor sitting Munchkin. Yes, all that needs to be re-piped, it’s a bit of a mess.

I would run the Munchkin a year or two longer. Certainly over a navien.

Parts are not that terrible to find . But i am on the east coast where HTP is located.

This discussion is a great example of, you catch what you’re fishing for. Keep in mind, the internet repeats urban legends like a ham radio repeater. Maybe it is a bed wrench. I don’t know. I would just like to know if people really believe firemen carried a specialized wrench to disassemble beds during a working structure fire…..

Lots of older plug valves on water systems and oil lines and the like had square shaft ends which one would turn to open or close the valve (hmm… I wonder if this is open? Closed? sometimes they had markings on them…) and one carried a key like that to operate them. I have one floating round here somewhere…

Boiler water is clear. Bladder is still in the tank with no degradation, completely collapsed.

Check out the pic, that is inside the tank. Leaning towards some sort of growth, Bacterial,fungal?

No corrosion at pipe joints, air eliminator, checks and so on.

With that much junk if floating through system the air handlers would have been plugged. No complaints on that end.

Antifreeze related 100%