Manufacturer’s notes from the label:
“High capacity semiconductor grade indicator resin (changes from green to deep blue upon exhaustion).
Ideal for use in pharmaceutical, medical, laboratory, or any application where high purity water is required.
For optimal performance and life, install after RO or distillation system.
Recommended flow: up to 1 gpm.
Estimated capacity: 300 grains or 5200 ppm.
Maximum Pressure: Up to 125 psi.”
(whole house & well units)