The UV Pure Quartz Sleeve with Seals (GDQ-L) is a genuine replacement component designed for use in Hallett 750 Potable ultraviolet (UV) water disinfection systems. It includes a precision-manufactured quartz sleeve and fitted seals (O-rings) to help maintain a water-tight installation. This component is intended to protect the UV lamp inside the UV chamber by shielding it from direct contact with water, allowing germicidal UV light to transmit effectively through the sleeve while helping preserve the lamp’s operational life.