Keep your water clean and your RO system running strong. This complete replacement filter set is specifically designed for the Water Doctor ROS4B 4-Stage Reverse Osmosis System. Each cartridge plays a vital role in delivering fresh, purified drinking water to your home.
Included Filters:
PP Sediment Filter Removes rust, sand, dirt, and other large particles ➤ Recommended replacement: every 6 months
CTO Carbon Block Filter Removes chlorine, odors, and improves taste ➤ Recommended replacement: every 6–12 months
T33 Post Carbon Filter Polishes and enhances water flavor before it reaches your glass ➤ Recommended replacement: every 12 months
RO Membrane Cartridge (TFC, 0.0001 μm precision) Filters out bacteria, viruses, heavy metals, and dissolved solids ➤ Recommended replacement: every 2–3 years
Quick Twist Design – Easy DIY Installation Each cartridge is built for quick twist replacement, requiring no tools or plumbing skills. Replace your filters in seconds!
Pure Water Starts with Clean Filters Ensure optimal performance and maximum protection for your family by replacing filters on schedule.
