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I called Amtrol, and unfortunately, could not get to a competent person to get a straight answer. The tech support simply read out the application of the "water heater safety tank" (thermal expansion tank) from the catalog. My issue is, it does the same thing, works the same way, operates in...

First of all, great site! I found this forum some years ago when I started having to trouble shoot my Grundfos VFD due to the shortsighted engineered obsolescence of this type of system (I fell victim to the promises of greater efficiency with VFD when my conventional well pump failed after...