Flow Controls (aka Flow Restrictors) are required for all RO systems and must be properly sized to the membrane capacity, typically 3-4 parts brine (drain water) to 1 part permeate (product water). The FR-402QI-650 is simple to install - just push the 1/4" tube firmly into the quick connectors.
Specifications:
NOTE: To optimize the efficiency and performance of the RO system, we recommend the installation of a Permeate Pump.