Should new resin bead in the Demineralizer Bottle be both purple and yellow?

Document ID

Document ID TE5373

Published Date

Published Date 27/05/2017
Question
Should new resin bead in the Demineralizer Bottle be both purple and yellow?
Summary
Color of demineralizer resin.
Answer
With the Demineralizer Bottle, 177 and 473 mL Capacity (Catalog number/Order code 1429900  and 2184600) half the resin beads are normally yellow, and half are purple. The purple beads contain an indicator that changes to yellow when the resin is saturated. The yellow beads work the same but do not change color when saturated. When all of the beads are yellow, discard them and replace with fresh resin.