Quartz Sleeve for Aqua Treatment Service ATS4-843 Replacement UVC Light Bulb DWS-12 you can find them here:

you can find them here:

Total Length: 11-3/8 inches

and is the most versatile system in its class

The lamp has an arc length of 12 inches and exceeds OEM standards of UV bulb performance

The lamp features an arc length of 4" and a total length of 6

Quartz Sleeve for Aqua Treatment Service ATS4-843 Replacement UVC Light Bulb DWS-12 you can find them here:Replacement Quartz Sleeve for Aqua Treatment Service ATS4 843 Replacement UVC Light Bulb The Replacement Quartz Sleeve for Aqua Treatment Service ATS4 843 Replacement UVC Light Bulb is an open ended quartz sleeve that is a guaranteed compatible replacement. The quartz sleeve works well with water sterilization filters, UV sanitizers and purifiers. The high sleeve works in unison with UV lamps in water disinfection units. With the help of quartz sleeve