The Pentek 255615-43 is the correct replacement for the following:
The Pentek 255615-43 1/4" Inline Filter is sold in a case of 12 and is a 1 micron carbon block cartridge that helps to remove chlorine taste and unpleasant odors. Also known as part number 255615-43, this Pentek inline drinking water filter features a John Guest connection with a 1/4" Quick Connect port size. The chlorine capacity of this inline water filter is up to 2,000 gallons @ 0.5 gallons per minute (gpm).
Pentek Inline Carbon Block Filter Cartridge Replacement specifications:
The Pentek 255615-43 carbon block filter can be used in any point-of-use drinking water appliance such as reverse osmosis systems, distillation systems, food service equipment, ice machines, misters, bottle-free water coolers, water fountains, refrigerators, coffee machines, espresso brewers and other water dispensing devices. The inline filtration systems also offer a wide variety of end termination and fitting options including 1/4" and 3/8" female NPT, 1/4" and 3/8" female Quick Connect, 1/4" OD stem and 1/4" male Jaco thread.