Virgin polyethylene tank with sealed lid and sub-micron vent filter prevent contamination Complete drain fitting and gasketed 12" covered fill hole, with cone bottom tank design High vortex stainless steel pump mixing action provides complete mixing in minutes and keeps the bicarbonate powder in solution Adjustable throttle valve improves disinfection and results in faster rinse out of the disinfectant Manual RO water valve, which sprays the entire inside of the tank, allows for quick and complete rinsing of the bicarb or disinfectant A timer prevents over-mixing of the solution Optional remote bicarb alarm package available