Compact units with 304 stainless steel reactor chamber, polished for laboratory and medical use, require minimum space. Microorganisms are inactivated within seconds; eliminates the need for long retention times or retention tanks. High output low pressure mercury vapor lamps with high isolation pin. Little change in water temperature even after prolonged periods of no water flow. Open end high quality quartz sleeve and stainless steel gland units. Automatic, unattended and user friendly operation. Fast and simple installation with three connections (two water and one electrical). UV imparts no change in taste, odor, pH or conductivity