BAMTROL EX-30 30 Extrol Expansion Tank ReviewbP PP AMTROL EX-30 30 Extrol Expansion Tank PInLine well tankPWatertight reservoir for expanded waterPThick, heavy duty ButylEPDM diaphragm for long service lifePSealed air cushion - factory pre-charged and 100 testedPStrong, deep-drawn steel tankP