From 40,000 to 48,000 grains is the most common size for a family of three to five with hard water. It’s big enough to regenerate about once a week while running at a salt-efficient setting.
Prices were last checked November 1, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Full ranking 14
- Whirlpool WHES48 PRO#1 of 14Full review
A strong all-round pick for larger families on hard city or well water: high flow, certified efficiency and a longer parts warranty for the price.
Blain's Farm & Fleet $679.99$679.9948,00011.9 gpm5,090 - Rheem Preferred Plus RHS42#2 of 14Full review
A well rounded certified softener for a family of up to six on hard city or well water.
Home Depot $549$54942,0009.9 gpm5,010 - Aquasana SimplySoft 40K#3 of 14Full review
A certified, salt efficient cabinet softener for a family of up to five on city water. Pick it over cheaper uncertified units if you want verified salt savings.
Amazon $749$74940,00011 gpm4,423 - Whirlpool WHES40#4 of 14Full review
A good value 40,000 grain softener for a family of three to five, with certified salt efficiency and strong iron handling.
Blain's Farm & Fleet $579.99$579.9940,0007.6 gpm5,094 - Aquasure Harmony 48K#5 of 14Full review
A budget metered softener sized for a typical family with hard water. It costs little per grain, but its capacity and salt use are not independently verified.
Amazon $629.99$629.9948,000-- - SoftPro Elite 48,000 Grain#6 of 14Full review
A premium family size softener for buyers who want long warranty cover and lower salt use and will pay for it.
Amazon $1,289$1,28948,000-- - AFWFilters Fleck 5600SXT 48K#7 of 14Full review
A straightforward Fleck 5600SXT softener for a family of three to five, for buyers who value a widely serviced valve over certification.
Amazon $804.99$804.9948,000-- - DuraWater Fleck 5600SXT 48K#8 of 14Full review
A standard Fleck 5600SXT softener for a typical family, best for buyers who already trust the Fleck valve and the seller.
Amazon $825$82548,000-- - Tier1 Essential 48,000 Grain#9 of 14Full review
A low cost 48,000 grain softener for a typical family on city water, for buyers who put price ahead of warranty and published ratings.
Amazon $599$59948,000-- - Kenmore 420#10 of 14Full review
A certified 40,000 grain demand softener for well or city water, but the price is hard to justify against similar models.
Amazon $822.77$822.7740,0007.7 gpm- - SpringWell SS4#11 of 14Full review
A mid size softener for four to six bathrooms, for buyers who want a long warranty and will pay well above budget brands for it.
SpringWell $1,680$1,68048,00013 gpm- - iSpring WCS45KG#12 of 14Full review
A space saving one tank softener for a mid size home, but it costs more and is backed for less time than better documented rivals.
Amazon $966.40$966.4045,000-- - GE Smart GXSH45W Discontinued#13 of 14Full review
A connected, certified softener for a larger family on city water that wants app alerts, while stock lasts.
Amazon $799$79945,0009.6 gpm5,120 - GE Smart GXSH35W Discontinued#14 of 14Full review
A connected softener for a mid-size household on city water that wants app alerts, while stock lasts.
Amazon $699$69935,0008 gpm5,120