Taco Comfort Solutions’ news micro expansion tank is for potable water, heating and chilled water applications. With tank volumes from 2.6 to 6.4 gal., the tank features a replaceable, full-acceptance heavy-duty butyl bladder, eliminating the need for special internal linings. The tank is NSF/ANSI 61-G certified and constructed per ASME section VIII Div. 1. Standard working pressure is 150 psi with optional working pressures of 175 psi or higher.