Everpure PFAS Water Filter Flow Restrictor Kit EV316231 - Compatible with Reverse Osmosis Systems & Under Sink Filtration

If you are switching over to any model of PFAS cartridge, this is the required restrictor fitting to control the flow rate. This is particularly important in any commercial application.

The exception to this rule would be if you have any of the following residential systems: H54, H104, H300, H300HSD, H300NXT or similar models starting with the letter 'S'.  These drinking water systems included a restrictor fittings kit, which should have been installed with the system. 

For more details :