The flood-resistant Jet Inc. 700++ Aerator is the only mechanical component in the 1500 Series BAT Media Plant and works in tandem with the BAT Media to provide complete biological processing. The aerator shaft spins and combines outside air with wastewater in the treatment compartment, flowing into the tank to provide oxygen for the treatment process. The dual-purpose foam restrictor protects the aerator by controlling foam created in the treatment chamber and also serves as a high-water alarm trigger. 800/321-6960; www.jetincorp.com.