The system uses nuclear-grade resin enclosed in a virgin polypropylene canister to purify tap water without the need for heating, which is required with a distillation process. The process removes calcium, magnesium, and other ionic impurities that can harm steam sterilizers. The unit can be placed on a counter top or wall mounted for easy installation. The Harvey DI treats up to 0.5 liters of water per minute. The volume of water processed is based on feedwater quality.
Maintenance consists of removing the cover to replace used cartridges.
A color-change indicator shows when a cartridge needs to be replaced. PermaFlo is a flowable resin composite and light-cure cement that has recently been introduced by Ultradent Products. It is available in a wide range of shades, including all 22 Vita shades as well as an UltraLite shade for use with bleached teeth. In particular, the company stresses that PermaFlo is quite translucent which contributes to its overall esthetics. It can also be used to lute esthetic, light-transmitting inlays, onlays, and veneers.