These Ultraviolet Disinfection (UV) Quartz Sleeves are manufactured by Waterite for their Excelight disinfection systems.
The UV sleeve is domed at one end and is open at the other end. It is shipped with two silicone O rings.
To ensure that your Excelight Disinfection System is operating effectively. replace the UV lamp after every year of running time. After twelve months, the ultraviolet (UV) lamp will no longer provide the necessary output to ensure proper bacterial disinfection. The UV quartz sleeve and O rings should be replaced if an inspection finds any moisture inside the sleeve, if there are any visible cracks or chips, or if the lamp can't be cleaned sufficiently as to be crystal clear.