The Hydrotech 36003036 is the correct replacement quartz sleeve for the following water filter systems:
The Pura #BB Quartz Sleeve Replacement for UVBB is a replacement quartz sleeve for the Pura UVBB series water filtration systems. This 20 inch Pura quartz sleeve offers thermal protection for your UV bulb against damage or contact with water. This UV quartz sleeve ensures proper water purification for your UVB series system. When replacing your UVBB filters be sure to clean and inspect the #BB quartz sleeve, and replace when damaged.
Pura #BB Quartz Sleeve Replacement for UVBB specifications: