Pentair Quartz Sleeve 50.75" | BioShield UV System | 523041 Pool Liner Accessories Inspect the weir each spring

Inspect the weir each spring when reopening the pool

or deteriorated

inspect the skimmer throat and surrounding deck flange for any cracking or deformation — a damaged mounting surface can prevent the cover from seating flush and may allow debris to bypass the skimmer opening

as well as compatible Pentair HiFlow and PacFab multiport valves with 1‑1/2 in

Installs in minutes

Pentair Quartz Sleeve 50.75" | BioShield UV System | 523041 Pool Liner Accessories Inspect the weir each springThe Pentair Quartz Sleeve (523041) is the OEM replacement quartz sleeve for the Pentair BioShield UV System 120 Watt (Model 522637), measuring 50. 75 inches in length. The quartz sleeve surrounds the UV lamp inside the BioShield sterilizer, transmitting ultraviolet light into the water flow while isolating the lamp from direct water contact. A cracked, clouded, or mineral scaled sleeve reduces UV transmittance and compromises disinfection output.