The Hydrotech 36002017 is the correct replacement UV lamp for the following water filtration systems:
The Pura #11 UV Replacement Lamp for UVB Filter Series is a replacement UV lamp for the Pura UVB Series water filtration systems. This UV water filtration lamp should be replaced every 12 months in order to ensure that your lamp does not lose ultraviolet effectiveness. This UV water filter bulb ensures that your UVC system efficiently purifies your water.
Pura #11 UV Replacement Lamp for UVB Filter Series specifications: