Small RO-500L/H 3x FRP Tanks Standard Drinking Water Purification System Compact Reverse Osmosis Drinking Water Purification System with FRP Pretreatment The Small RO-500L/H Reverse Osmosis Water Purification System is a reliable and efficient solution for producing high-quality purified water from various raw water sources. Designed with advanced Reverse Osmosis (RO) membrane technology and optional FRP pretreatment tanks, this system is widely used for commercial drinking