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system evaluation, who does it?
Our condo association uses an old Ford stone-lined solar water heating system. The system was installed around 1985 or so, and appears to be showing some signs of aging. One tank may be 'sagging' a bit, for example.
Our condo association owns a three unit building in Cambridge, MA. We would like to get our system evaluated --- is it likely to fail, what would any useful repairs cost, and so forth.
Who can we ask to do that kind of evaluation work? Is it something a regular plumber can do, or is it more of a question for a specialized engineer?
We would appreciate advice about how to handle this situation.