The (HGT-HGTV) Series bladder
expansion tanks are available in sizes from 2 to 80 gallons in either in-line
or stand models. The two-shell welded construction allows the tank to withstand
high pressure and therefore adds safety to your installation. The butyl bladder
separates air from water and prevents waterlogging while saving space and
energy. These devices are indicated for use in hot water, solar and cooling
systems, in addition to being compatible with glycol.