Latest Discussions : HVAC


07:38AM | 10/26/05
Member Since: 02/26/01
35 lifetime posts
I have a 70 year old house with an equally old hot water heating system w/ radiators. The impeller in the Bell & Gossett circulator seized up this weekend and I replaced it with a spare the former/original kept. However, I had no anti corrosion additive. Does anyone know where I can purchase anti corrosion additive? I would greatly appreciate any leads/info. as to a source.

Also, I live in Northern Virginia and two local plumbing supply houses only sell antifreeze. However, I read where the antifreeze must be changed regularly (something breaks down and creates a more acidic solution) and the anti corrosive agent is only secondary.

Any help would be greatly appreciated.

P.S. I was forced to drain the system because there were no isolation or shut-off valves on either end of the circulator.


01:10PM | 10/26/05
Member Since: 02/26/01
35 lifetime posts
HKestenholz, thanks for the input. Your response certainly makes sense. I’m just reminded of a time when my wife’s father put all water in her car’s radiator and it created havoc later on. However, unlike my heater system, the car is not truly a closed system. The heating system was last opened about 20 years ago to replace the whole circulator pump and at this point has no leaks so I don’t see any introduction of new water after this initial re-fill. At this point it guess it’s best to just add antifreeze with a corrosion inhibitor (probably through the drain valve using a drill pump) and between the corrosion inhibitor and natural depletion of oxygen I should be OK for another 20 years. I love these old, simple systems and would like to see this one go another 70 years!

Thanks again.

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