The Caleffi NA573102 is the 10 in color-changing demineralizing filter cartridge for the NA573 water treatment filling unit, the replaceable ion-exchange element that strips hardness minerals from make-up water and changes color as the resin exhausts.
Product data compiled from Caleffi North America technical documentation. Last reviewed July 2026.
Key Features
10 in Demineralizing Cartridge
Replaceable ion-exchange element for the NA573 filter housing.
Color-Change Indicator
Resin shifts color as it exhausts, signaling replacement time at a glance.
Scale and Corrosion Protection
Strips hardness minerals and lowers conductivity of make-up water entering the loop.
Technical Data
| Function | Filling unit service part |
| Cartridge | 10 in color-changing demineralizing filter |
| Application | NA573 filter housing (NA573100 / NA573022) |
Documentation
Technical brochureRelated Products
- Caleffi F59650 Service Part
- Caleffi NA10197 Service Part
- Caleffi NA570971 Service Part
- Caleffi 535051A 3/4 in Auto Fill Valve
Frequently Asked Questions
Which housing does the NA573102 fit?
The Caleffi NA573 filter housing (NA573100), also used in the NA573022 replenishment filling unit.
How do I know it needs replacing?
The color-changing resin visibly shifts color as its demineralization capacity depletes.
- Type:
- Accessory
- Series:
- AutoFill
