ASME - all large volume commercial storage tanks are certified to ASME boiler and pressure vessel code standards
Long life tank design: unique steel formulation with high temperature porcelain enamel maximizes corrosion-resistance and results in a superior tank design, heavy-duty magnesium anode rod(s) are installed for longer tank life
Tank openings - circulating line/cold inlet connections are 3'' NPT (2-1/2'' on 200 gal) and hot outlet is 2''