Quick Answer: The Matrixx is a well-specified smart softener: a Bluetooth metered valve, 10% crosslinked resin, a lifetime tank and resin warranty and 10 years on the valve and electronics. It suits a buyer who wants app monitoring and is comfortable buying direct, because US Water Systems sells it only through its own website. It's not on Amazon. If you'd rather buy on Amazon, the SoftPro Elite HE 64k is the closest high-efficiency match. The DuraWater Fleck 5600SXT 48k is the pick if local serviceability matters most. The GE Smart 35,000 grain softener is the pick if you mainly want app alerts and leak detection.
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The most useful thing on the Matrixx spec sheet isn't the Bluetooth. It's a small table that gives every Matrixx four different grain capacities. Most softener brands print one big number and leave it there. US Water Systems shows you what that number costs in salt, and that tells you a lot about how to run any softener well.
In this guide
One tank, four capacity numbers
From the Matrixx product page:
| Model (service flow) | High-efficiency setting | Optimal setting | Maximum setting | Absolute max |
|---|---|---|---|---|
| MXX-100 (10 gpm) | 15,000 | 24,000 | 32,000 | 35,000 |
| MXX-150 (15 gpm) | 22,500 | 36,000 | 48,000 | 53,000 |
| MXX-200 (20 gpm) | 30,000 | 48,000 | 64,000 | 70,000 |
Resin tanks across the range come in 9" x 48", 10" x 54" and 12" x 52" sizes.
Read across the MXX-150 row. The same tank of resin delivers 22,500 grains when you run a lean salt dose and 48,000 when you pour on salt. That's the trade every softener makes. The Matrixx just admits it. If you want to understand why, our explainer on what grain capacity actually means and our guide to setting the salt dose go deeper.
What this means for sizing: pick the model whose optimal number covers about a week of your household's grain load. A family of four at 15 gpg uses roughly 4 × 75 gallons × 15 = 4,500 grains a day. The MXX-150 at its optimal setting (36,000) gives about eight days, which is a good rhythm. The MXX-100 would cycle every five days, which is still fine for a smaller home. The MXX-200 is for big families, very hard water, or homes that need the 20 gpm flow.
The valve and the app
US Water Systems describes the Matrixx valve as WQA Gold Seal certified, made in the USA, with a single internal moving part. It's metered, regenerating on demand rather than on a timer. The listed operating range is 20–100 psi and 39–100°F, and it runs on low voltage (12V output from a 100–240V adapter), with a battery backup for power outages. Ports are 1 inch, with 1" or 3/4" NPT connections listed.
The app is Legacy View, available on iOS and Android. Over Bluetooth, it shows:
- Real-time water use and regeneration cycles
- Salt level
- Peak flow and average daily use
- 90-day usage reports
- Settings you can change from your phone
Keep in mind that this is Bluetooth, not Wi-Fi. You'll get data when you're near the softener with your phone, not push alerts at work. A competing dealer also points out that the same app is used on other brands' Bluetooth valves. So the app is useful, but it isn't unique to the Matrixx.
The rest of the package
- Resin: NSF-certified, 10% crosslinked
- Tanks: fiberglass with a chrome jacket, made in the USA
- Brine tank: 15" x 17" x 36", holding up to 220 lb of salt, with an internal float and safety overflow
- Salt: potassium chloride works too
- Install: US Water Systems describes five connections for DIY installation
- Warranty: lifetime on tank and resin, 10 years on valve and electronics, plus a one-year satisfaction guarantee
Standard Matrixx or the Hybrid?
US Water Systems also sells a Matrixx-Hybrid. It uses a split "Vortech" tank with carbon on top and softening resin below, so you get chlorine and taste reduction plus softening in a single tank. It's offered in the same 10, 15 and 20 gpm sizes, uses the same 1-inch Bluetooth metered valve, and has the same lifetime tank/resin and 10-year valve/electronics warranty.
Here's how to choose:
- Chlorinated city water, limited floor space: the Hybrid makes sense. Carbon ahead of resin protects the resin from chlorine, and you save the footprint of a second filter tank.
- Well water without chlorine: the standard Matrixx. The carbon layer has less to do, and if you have iron or sulfur, you need US Water Systems' dedicated iron/sulfur combo instead, or a separate iron filter in front.
- You already have a whole-house carbon filter: the standard Matrixx. Don't pay for carbon twice.
Before choosing the Hybrid, ask US Water Systems how and when the carbon layer gets replaced, since it shares a tank with the resin.
This review covers the standard softener.
On salt: a 220 lb brine tank on an MXX-150 at the optimal setting will last a long time between fills. How long depends on your hardness and dose. Our guide to how much salt a softener uses shows how to estimate it.
The part to think hardest about: buying direct
The Matrixx is sold from uswatersystems.com. We searched Amazon and found US Water Systems accessories, like an installation kit, but not the Matrixx softener itself. Buying direct has upsides. You deal with the company that built it, and its phone support gets consistent praise in published reviews. It also has downsides:
- One source for parts. A single-moving-part proprietary valve can be very reliable. But when it does need a part, it comes from US Water Systems, not the supply house down the road that stocks Fleck and Clack.
- Returns and shipping. A competing dealer, Mid Atlantic Water, summarized public complaints about US Water Systems as covering refunds, late shipments, leaks and failed parts, and cited a restocking fee in the return policy. Mid Atlantic sells against them, so weigh that accordingly. But read the current return policy yourself before ordering.
None of that is a reason to rule it out. It's a reason to understand the after-sale path before you buy.
Who it suits, and who it doesn't
Good fit if you:
- Want app-level detail on water use and regeneration without paying a dealer
- Value a long warranty in writing (lifetime tank/resin, 10 years valve/electronics)
- Are comfortable doing a five-connection install, or have a plumber who is (our installation mistakes guide is worth reading first)
Look elsewhere if you:
- Want to buy through Amazon, or want the easy-return path of a big retailer
- Live somewhere local water treatment pros only stock Fleck or Clack parts
- Want true remote alerts on your phone away from home (Bluetooth won't do that)
Three Amazon-available alternatives
If you want high efficiency from a direct-to-consumer brand: SoftPro Elite HE 64,000-grain. SoftPro says it saves up to 75% on salt and 64% on wastewater. It uses fine-mesh resin, flushes stagnant water automatically after 7 days of non-use, and carries a 10-year valve warranty and lifetime tank warranty. SoftPro markets this version for well water, and at 64,000 grains it lines up with the MXX-200 more than the MXX-150. The downside is that SoftPro doesn't name its valve maker, so parts come through SoftPro, and there's no Bluetooth app built into the valve. Check price on Amazon
If serviceability matters most: DuraWater Fleck 5600SXT 48,000-grain softener. The Fleck 5600SXT is about the most common residential valve there is, with aftermarket parts and rebuild kits at almost any supply house. This metered system comes with 1.5 cu ft of resin in a 10×54 tank, a 14×36" brine tank with a safety float and a 1" bypass. It has no app, but you're not tied to one company for repairs. The downside is that you give up the Matrixx's usage reports and long branded warranty. Check price on Amazon
If app alerts are the main draw: GE Smart Water Softener, 35,000 grain. Unlike the Matrixx's Bluetooth app, GE's built-in Wi-Fi sends alerts to your phone wherever you are when it detects continuous water flow, plus low-salt reminders. Add GE's optional shutoff valve and you can turn off the house water remotely. The downside is capacity: at 35,000 grains it suits small-to-mid households better than big families with very hard water. Check price on Amazon
Verdict
On paper, the Matrixx is one of the better-documented smart softeners you can buy direct. It has honest capacity tables, a certified valve, good resin and a strong warranty. The trade-off is the channel. It's only sold by US Water Systems, it isn't on Amazon, and parts and returns go through one company. If that's fine with you, size it by the "optimal" column and it should serve you well. If not, the SoftPro Elite and the Fleck 5600SXT above are the closest Amazon equivalents.