US Water Systems Matrixx Smart Metered Water Softener (MXX-100, 10 gpm)

Checked against its certification listings: what they cover, what the maker claims, and what it costs over five years.

Water softener

Listings checked Oct. 13, 2026

Certified to

Not on any listing

NSF, WQA, IAPMO, checked Oct. 13, 2026. Every claim on this page is the maker’s alone.

Service flow: 10 gpm
Built for: Not stated
Rated capacity: 35,000 grains
Regenerates: On demand

Maker’s list price

$2,445

as of Oct. 13, 2026

Five years, household of 3

$2,445

0.6¢ per gallon

Salt can’t be counted. The real total is higher.

The maker’s page

List price from the maker’s site, checked Oct. 13, 2026. Prices change; the maker’s page is the final word.

No certification found

Not on any listingNSF, WQA, IAPMO, checked Oct. 13, 2026

TapBuff searched the certifiers’ own listings and found nothing for this product. That does not mean it does not work. It means no independent certifier has confirmed what it reduces, so every claim below is the maker’s alone.

Certified for, and claimed

Certified, by a listing

Nothing.

Claimed by the maker only

hardness, by salt-based ion exchange

What it costs over five years

Household of 3, 240 gallons a day through the whole house. Installation not included.

Item	Replaced	Count	Amount
System, with first media	—	1	$2,445

Five-year total$2,445

Per gallon0.6¢

Not included, because the maker publishes no price or rating: salt (the maker names no setting as its default or rated one). The real total is higher.

Work it out for your water

Salt and regeneration

The maker publishes the settings below but names none as its default and states no efficiency for any, so TapBuff leaves salt out of its total rather than pick one.

Salt settings the maker publishes
Salt per regeneration	Capacity	Grains a pound	Water each time
3 lb	15,000 grains	5,000	33 gal
6 lb	24,000 grains	4,000	59 gal
15 lb	32,000 grains	2,133	67 gal

Settings from Matrixx Smart Metered Water Softener (salt settings table), US Water Systems, checked Oct. 13, 2026. Less salt per regeneration gets more from each pound but regenerates more often.

Softening water at 10 grains per gallon adds about 80 mg/L of sodium, by Nebraska Extension’s figure of about 8 mg/L a grain.

Every softener, worked out for your water

Worth knowing

The maker labels its three settings "High Efficiency," "Optimal" and "Maximum" but names none as the default or states an efficiency, so its salt isn't worked out here. It says its control valve is WQA Gold Seal certified and its resin NSF certified; those are parts, and no listing covers the softener. Its page gives a peak flow of 12 gpm in one place and 27 in another; 10 gpm is the size it is sold as. Price recorded is the $2,444.92 list price; US Water Systems showed $1,466.95 on Oct. 13, 2026.

Install requirements

Kind	Water softener
Rated media life	Not stated
Needs a drain	Not stated
Needs power	Yes

Other whole-house systems

All whole-house systems