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I just saw the post by the gentleman concerning the white crap in his GB142, I'm somewhat familiar with (at least from cleaning the HX-er out and what to do that way). I typed up a whole post on exactly what to do with recommendations, etc. but then I stopped myself. I made mention of the fact he should use a combustion analyzer afterwards to check it out, as well as soap test all connections, and use a proper CO and GAs Leak detector to confirm it's safely put together on top of recommending that if he damages gaskets while taking it apart the few times you need to do it to do the procedure, that he should replace them. However I am concerned that he might print this out, use it, and then what if something happens? What if this homeowner takes this professional advice I may give him, and kills himself and his family? and the only thing left are the instructions I type beside the boiler on a stool that the Coroner or his family finds? Would I be at fault?
This site is a great service for a person who is interested in heating and looking for help (I like to use it to network with other contractors and garner information to make myelf better), however something needs to be said for liability.
Dan perhaps you can offer some insight in this regard. It's not that I don't want to help, but as a Gas Fitter (and plumber, and hydronic tech & designer) it's my duty and responsibility as per my Provinces Gas Safety Act to act responsibly. This means recognizing an unsafe condition and shutting things down, and overall being responsible for the safety and protection of people, and property.
Class 'A' Gas Fitter - Certified Hydronic Systems Designer - Journeyman Plumber