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Posted by HeatPro on November 01, 2007 at 22:25:56:
In Reply to: old expansion tank - new boiler posted by Jim on November 01, 2007 at 22:11:11:
Unless the new tank is listed in the contract for the new installation, he isn't required to install a new tank. However, squeaky wheels often get greased, and it is a good fix to the water-logging problem of the old tank to replace it with a bladder-type tank.
However, unless the boiler plate says that the boiler is built to operate at 40 psig instead of 30 psig as the safety relief valve was set at that, he is in BIG trouble and would be liable for any accident. Safety relief valves are usually not adjustable and shouldn't be changed from the pressure setting on the tag.