Our verdict
Pick the Aquasure Harmony AS-HS48D if your household or hardness needs more capacity. Pick the iSpring WCS45KG if you prefer iSpring's support and parts and its stated figures suit your water.
The central trade-off
Grain rating. Aquasure Harmony AS-HS48D: 48,000 grains; iSpring WCS45KG: 45,000 grains.
Service flow. The Aquasure Harmony AS-HS48D lists 12 GPM; the other listing doesn't state one.
At an efficient salt setting. About 36,000 grains for the Aquasure Harmony AS-HS48D and 33,800 for the iSpring WCS45KG between regenerations (three quarters of each rating). Check both against your water.
Side by side
| Specification | Aquasure Harmony Series AS-HS48D 48,000-Grain Water Softener | iSpring WCS45KG 45,000-Grain Water Softener |
|---|---|---|
| Type | Not stated by the maker | Not stated by the maker |
| Grain rating | 48,000 grains | 45,000 grains |
| Service flow | 12 GPM | Not stated by the maker |
| Control valve | Not stated by the maker | Not stated by the maker |
| Resin | Not stated by the maker | Not stated by the maker |
| Dimensions | 10"L x 10"W x 62"H | 13"L x 22.5"W x 50.5"H |
| Shipping weight | 120 lb | 115 lb |
| Warranty | Not stated by the maker | Not stated by the maker |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.
Which should you choose?
Choose the Aquasure Harmony Series AS-HS48D 48,000-Grain Water Softener if
- Your household or hardness needs more capacity
Choose the iSpring WCS45KG 45,000-Grain Water Softener if
- You prefer iSpring's support and parts
- Its stated figures suit your water