This kit includes a small tank that connects to the 1/4-inch light blue elbow on the Merlin. The kit forces permeate water to flush the high salt concentrate water from the membrane elements. By doing this, the system rests with low salt concentrations on both sides of the elements. Because low salt concentrations remain on each side of the membrane, salt diffusion is greatly reduced. The kit uses approximately 0.7 gallons (2.5 liters) of permeate water to flush the membrane elements each time it operates.People who bought this item also bought: