The short answer
They don't remove hardness: a test reads the same afterwards. Makers describe reduced scale; results depend on the water and the plumbing.
What they claim
Makers describe a coil or magnet on the pipe changing how scale forms. None claims to remove calcium or magnesium.
What to check
- The pipe material and diameter the maker lists.
- An outlet near the main line (electronic models).
- The return terms, since results vary.
Units we cover
briskspring J-600-BS Electronic Water Descaler, iSpring WGB22B-DS Electronic Water Descaler, Eddy ED6002P-US Electronic Water Descaler. For soft water, an ion-exchange softener is the tool.
Products mentioned
Electronic descaler · briskspring
briskspring J-600-BS Electronic Water Descaler
Electronic descaler · 17.6 GPM
Electronic descaler · iSpring
iSpring WGB22B-DS Electronic Water Descaler
Electronic descaler · 15 GPM
Electronic descaler · Eddy
Eddy ED6002P-US Electronic Water Descaler
Electronic descaler · 10 GPM
Questions readers ask
Will an electronic descaler soften my water?
No; hardness stays the same on a test.
Do electronic descalers work on PEX pipe?
Check the maker's listing; some list supported pipe materials.