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Question DetailsAsked on 1/6/2018

reports on centraire heating

I just had Centraire Heating and Air Conditioning 7402 Washington Ave, Eden Prairie, MN 55344 replace an expansion tank on my boiler. The cost of the expiation tank was $300.00 and the total cost was $705.00. Does this seem high?

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1 Answer


Depends on the size of the needed tank. For a normal hydronic heating system or fairly modern (say not over 20 or so years old) steam boiler, just a "football" tank of under 5-8 gallons is usually all that is needed - costing about $50-100 normal billout rate for the expansion tank only, or about $100-200 including inlet control valve (which with the tank regulates the inflow of makeup water to replace any leakage and vented steam) - and usually minimum service charge to replace it, so about $75-150 for labor commonly (during normal business hours). Here is what those units commonly look like -

If you have an older so-called "unregulated steam" live steam boiler, sometimes they need a 15-80 gallon expansion tank - which can run into the several hundred dollar range. Sometimes these tanks also act at the same time as a well pump pressure stabilization tank - commonly look like a small diameter water heater like this -

commonly tucked up into the overhead floor joist space, and can run $250-1000 billout for the tank, plus commonly $100-300 installation cost (because it is usually a 2-plumber job).

So depending on which you got, could be in the range - or could be about 2-3 times higher than normal. Also depends on whether a pressure regulator or backflow preventer had to be replaced at the same time - that can commonly add 50-100% to the job cost over a simple football tank cost.

Here are links to some similar previous questions with answers:

Answered 2 years ago by LCD

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