To help make pump tank installation easier, Perma Tank Water Systems, a State Industries company, has factory-installed the Hydro-Air Pump Control Module, which puts the pressure switch, gauge and air valve on the top of the tank. The module also helps protect the pressure switch from liming, scaling or freezing; places electrical connections in a safer, more convenient location; and allows connection to be made from either the front or back of the tank, with no special fittings required. Perma Tank Water Systems. Card No. 16