Inline Check Valve's 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-80-JG is simple to install - just push the 1/4" tube firmly into the quick connectors.
Specifications:

• 1/4" QC x 1/4" QC
  
• Quick and easy installation
  
• RO Membrane Flow Rate: < 10 GPD
  
  NOTE:

To optimize the efficiency and performance of the RO system, we recommend the installation of a Permeate Pump.