WET Residential Reverse Osmosis System Showing the single result Default sorting Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low Residential Reverse Osmosis The 139BP models can produce up to 120 GPD, 0.45 m3/d of great tasting pure water. Includes models for both chlorinated (CAK) and non-chlorinated (NAK) water. Select Options