The Pentek 155165 is the correct empty replacement filter cartridge for the following water filters:
The Pentek 155165 Empty Filter Cartridge is sold in a case of 25 and is a 20" replacement empty filter cartridge for the Pentek GAC-20 water filter. This empty filter housing measure 2.5" x 20" and is made from high quality, durable material in order to be long lasting. With a replacement water filter housing you can transfer the old media into the new Pentek GAC shell and resume your quality water filtration.
Pentek 155165 Empty Filter Cartridge specifications: