Review on Ronaqua Sediment Cartridge Filtration Polypropylene by Omar Austin

These are quality units that work as advertised and are sure to make a reverse osmosis system a success. I would wholeheartedly recommend doing 3 in a row though depending on your settings. 2 in a batch for me working 24/7 only lasts 3 months using 550ppm Michigan well water. If you have city or municipal water you probably won't need to change filters for a few months, but if you struggle with well water like me, you need to think about a pre-filter before two filters, or just buy one. and change filters every few months.