Completely cabinetized models Includes a still and an appropriately matched tin-coated storage tank in a neat, compact and clean unit. Space saving design takes up less space than conventional units, while allowing for point of use installation. Fully automatic hands-free operation turns still off when the tank is full; restarts still when tank empties. Automatically drains the boiling chamber every time the unit is off and every 4 hours of operation, helping to keep your still clean. Choice of two sizes: 2 or 5 GPH. The Model 210 (D3180-1/-1E) is a 2 GPH still and 10-gallon storage tank for the production of distilled water. Safety feature interrupts power to heating elements if feed water is off. Optional bench stand for bench mounting of still. The Model 525 (D3180-2/-2E) is a 5 GPH still and 25-gallon storage tank for production of distilled water. Purity meter alerts you of distilled water purity in storage tank. Q-Baffle® allows for pyrogen removal. Optional recirculation pump and base mounting stand available. Storage tank is equipped with a UV lamp for bacterial control. Both models use tap feedwater.