North American made and best overall value.


GRO-475B & GRO-475M (4-stage)
The Aqua Flow 4-Stage Reverse Osmosis Systems is hands down our best seller for drinking water. Makes perfect water for cooking, drinking, tea and coffee. All systems are NSF certified, easily maintained with do-it-yourself quick change filters, and represent industry leading economy.
- High efficiency GRO 75 GPD membrane technology
- Effortless click-in lock cartridge installation
- Will remove chlorine, chloramines, VOC, e-coli and cryptosporidium
- Color coded cartridges to maintain proper filter sequence
- storage tank 4 gallon
- Built-in check valve with multi-point backflow protection
- Faucet included
The 4 Post Aqua Flow Premium QC Reverse Osmosis System is an effective purification system for your drinking water and fridge ice maker. The quick connect filters make changes easy, convenient and cost effective. No heavy water bottles or cases to carry and store, the tap is installed at your kitchen sink and at hand..anytime. Coupled with a water softener this RO system will give you many years of pure drinking water and toss those water bottles for good.