These potable water expansion tanks feature a 100% butyl diaphragm and plastic liner to separate the system water from the tanks air precharge. The system has a stainless steel sleeve to prevent corrosion, something no other manufacturer offers. And, the tanks are finished with appliance-quality paint to help prevent external corrosion. On top of all of this, every PH tank is comprehensively tested and backed by Flexcon..
Flexcon PH Series potable water expansion tanks are designed to maintain safe pressures in a domestic water heating system that utilizes a backflow preventer or check valve. PH tanks feature a butyl rubber diaphragm and plastic liner to separate the system water from the tanks air pre-charge. The system connection has a stainless steel nipple to prevent corrosion. An appliance quality paint finish helps to prevent external corrosion. Every PH tank is comprehensively tested. 3/4-Inch MNPT connection.