ERO 300 Three Stage RO System


This is a three stage reverse osmosis system. The carbon block pre-filter removes chlorine and small particulates so the RO membrane is not damaged. The carbon block post-filter adds a finishing touch for taste and odor. Find compatible filters below.


Due to a discontinued membrane, we recommend switching to the PureValue 5EZ50-RK RO Retrofit Kit for continued use if your tubing is 1/4" in size. This allows for continued use the tank and faucet and for an upgraded membrane to be used for updates in filtration technology. Please check your system as a different retrofit kit may be required.



  • STAGE 1 - Carbon Block Pre-Filter (OMB934-5m) - Replace Every 12 Months
  • STAGE 2 - RO Membrane TFC 18 GPD (1220188DISCONTINUED - Replace with the PureValue 5EZ50-RK) - Replace Every 24 Months
  • STAGE 3 - Carbon Block Post-Filter (OMB934-5m) - Replace Every 12 Months