Expansion tank for heating UNI-FITT 18L is used to compensate for temperature expansion of the coolant in closed heating systems. The uni-FITT vertical expansion tank for heating consists of a housing (high-quality steel) and an elastic membrane (rubber). The membrane of the expansion tank for heating divides the tank into two chambers: air (the cavity between the metal body and the membrane) and water (the inner cavity of the membrane itself). The air chamber of the expansion tank is always under a pre-set air pressure. Operating conditions of the expansion tank for heating:the operating temperature is from -10 to +100 degrees Celsius, the maximum operating pressure is 5 bar, the preset pressure is 1.5 bar. The color is red. Connection diameter is 3/4". Height 423mm, diameter 280mm. Tank type-vertical suspended.