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Give it purpose - fill it with water filters, air filters, refrigerator filters, and more.
The Pura 36003035 Quartz Sleeve is the 20 inch replacement quartz sleeve for the PURA UV Add-On Series. Replaces sleeve on the UV Add-on-3 and other PURA UV20 Series UV Systems.
The Quartz sleeves should be wiped clean and inspected every 3-6 months. If the sleeve shows signs of damage it should be replaced immediately.