Basically you use the waste water from the first membrane housing and feed into the second membrane housing which works if you have sufficient water pressure to the unit

Color changing resin changes color from blue to amber as resin is used up (exhausted)

PRESSURE REDUCING RO VALVE: PRODUCT SPECS

Longer run times mean better RODI system cycles of operation

Maifan stone is well known for its ability to increase the concentration of dissolved oxygen in the water

Triple Filter Bracket (Steel) NSF Certified Basically you use the wasteTriple Filter Bracket (Steel) This is a powered coated steel triple filter bracket. It can accommodate up to three standard 10 " filter housings. It is white in color and very sturdy. Dimensions and Weight Dimensions: Width: 14. 0" X Height: 2. 0" X Depth: 5. 75" Weight : 2. 0 Pounds