Quick Answer: The Aquasure Signature Elite isn't one product. It's three: Aquasure's Fortitude Pro KDF/carbon whole-house filter, a Harmony fine-mesh softener and a 75 GPD under-sink RO, sold together. It's a sensible buy for a city-water home that wants chlorine reduction, soft water and RO drinking water in one order, and the 48,000-grain version is the size most families need. On Amazon right now, only the 32,000-grain Signature Elite is in stock, which suits 1–2 bathroom homes. Don't buy it if you already have an RO, or if you only need softening. The Aquasure Harmony 50k fine mesh alone covers that. Want a more serviceable valve? Pair a Fleck 5600SXT softener with carbon filter with a separate APEC ROES-50.
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Signature Elite is a bundle name, not a model. Aquasure takes three things it already sells separately and ships them together. Lowe's spells it out plainly for the 48,000-grain version (model AS-SE1000FM): the Whole House Fortitude Pro treatment system, the Harmony whole-house water softener and the Premier Series reverse osmosis drinking water system.
So the honest way to review it is piece by piece, then ask whether the bundle beats buying the pieces you actually need.
In this guide
The three parts, and what each one does for you
| Component | What it is | What it's for |
|---|---|---|
| Fortitude Pro | Whole-house tank with KDF and carbon media plus a pleated sediment pre-filter (Aquasure sells it alone in 1,000,000- and 1,500,000-gallon versions) | Chlorine, taste and odor, sediment. It also protects the softener resin |
| Harmony softener | Ion-exchange softener with fine-mesh resin and Aquasure's Aquatrol digital metered control head | Hardness. The fine mesh also handles some dissolved iron |
| Premier RO | 75 GPD under-sink reverse osmosis with an Aquasure membrane | Drinking and cooking water at one faucet |
Retail listings add a few more details. One retailer lists the softener's outlets as 1-inch threaded ports that connect to plumbing up to 1-1/4 inch, the max inlet TDS as 2,000 ppm and the KDF media as KDF55 (with an optional upgrade to KDF85 for iron). Cartridge replacement is listed at about 6 months, while the same page elsewhere says 6–12 months. Lowe's lists a 5-year manufacturer warranty on its Signature Elite listing. Another retailer says the 5-year extended warranty applies if you activate it online within 60 days, so do that the week it arrives.
The listings don't agree with each other, so check yours
This bundle has some of the messiest retail listings we've seen. The larger version is sold as 70,000 grains at Lowe's and Home Depot and 72,000 grains elsewhere. One listing calls it right for "4-6 bathrooms" in the title, "5-6" in the description and "1-2" in the features. The 48k version is listed by Lowe's for 1–4 people in one place and 3–4 bathrooms and up to five people in another.
None of this means the hardware is bad. It means you should size from your own numbers, not the listing's bathroom count. Our rough rule: a family of four at 15–20 gpg sits comfortably on 48,000 grains. Five or more people with very hard water should consider the larger version.
Is the order of components right?
Yes. Water hits the Fortitude Pro filter first, then the softener. RO sits under the kitchen sink on a separate line. That order matters for two reasons:
- Chlorine is hard on softener resin over time, and taking it out first is the textbook reason to run a carbon filter and a water softener together.
- Sediment caught up front keeps grit out of the softener valve.
If you're unsure about your own layout, our guide on whether a filter goes before or after a softener walks through the exceptions.
One plumbing decision you'll still have to make is whether the RO gets softened or unsoftened water. Feeding it softened water is the common setup and it's fine. Some people also run a separate unsoftened cold line to the kitchen. We cover the trade-offs in should a kitchen tap bypass the softener.
City water or well water?
City water with chlorine and hardness: This is the bundle's sweet spot. Each part has a job.
Well water with light iron and hardness: The fine-mesh Harmony resin handles some dissolved iron, and the KDF85 upgrade is pitched for iron. That works for light iron. Fine-mesh resin also fouls faster when iron is present, so plan on a resin cleaner and read up on softener resin fouling. Heavy iron, sulfur or iron bacteria needs a dedicated iron filter, not this bundle.
Well water with bacteria concerns: The Signature Elite has no UV unit as standard. One retailer mentions a 12 gpm Quantum UV as an optional add-on.
What owners of the softener half report
We couldn't find a meaningful body of written reviews for the full Signature Elite bundle. The Home Depot page for the 70k version shows only a handful. The Harmony softener at its core has more owner feedback. Pulling the recurring themes from a review aggregator:
- Good: Install often takes around two hours with a pre-plumbed loop. Owners describe the control head as easy to customize (pre-flush time, reserve gallons) and support as responsive.
- Watch for: Quick-connect fittings leak if they aren't fully seated, and leaks during regeneration often trace back to swapping the supplied hoses and washers for hard pipe and tape. Owners also report brine-hose pressure issues. The tanks are heavy, so plan on two people.
- Maintenance: Fine-mesh resin may need periodic cleaning additives, especially on well water.
Add the RO and the Fortitude Pro on top of that, and you have more fittings, more cartridges and more to keep track of. That isn't a flaw. It's just what owning three systems looks like.
What a year of ownership looks like
Three systems means three maintenance rhythms. Put them on one calendar from day one:
- Every few weeks: Check the brine tank salt level. Keep it topped up so the salt sits above the water line.
- About every 6 months: Replace the pre-filter cartridges. That's the interval one retailer lists, though another section of the same listing says 6–12 months. Let a pressure drop at the faucets be your tiebreaker. The RO's pre-filters follow their own schedule, so check the Premier RO manual.
- Yearly: Test hardness after the softener and TDS at the RO faucet. If hardness is creeping back, look at the softener settings before blaming the resin.
- On well water with iron: Add a resin cleaner on a regular schedule.
Our water softener maintenance schedule lays out the softener side in more detail. The point here is simple: if you'd forget to change cartridges, a bundle with more cartridges will show it.
When to skip the bundle
- You already have an RO, or you drink bottled or pitcher-filtered water and are happy with it. You'd be paying for a component you don't need.
- Your water isn't chlorinated (most private wells). The Fortitude Pro's main job, chlorine reduction, is wasted. A sediment filter and the softener may be all you need.
- You want a widely serviced valve. The Aquatrol head is Aquasure's own. Fleck and Clack parts are easier to find at local suppliers.
- You have tight floor space. Two whole-house tanks plus a brine tank take room at the main line.
Alternatives, depending on what you actually need
Only need soft water? Aquasure Harmony Series 50k fine mesh. It's the same softener family as the bundle, with prefilled fine-mesh resin that Aquasure rates for up to 10 ppm of iron, a stainless steel bypass valve and a triple-purpose cartridge pre-filter instead of the full Fortitude Pro tank and RO. Aquasure pitches it for 3–4 bathrooms. It's the obvious choice if the softener is the only part you'd use. The downside is that a single pre-filter cartridge isn't a whole-house KDF/carbon tank, and you get no drinking-water stage. Check price on Amazon
Softener plus chlorine reduction, no RO? Add an Aquasure Fortitude Lite KDF55/GAC system ahead of the softener. It's the lighter sibling of the bundle's Fortitude Pro: a pipe-in, pipe-out tank with NSF-certified GAC/KDF55 media and a 20" pleated sediment pre-filter, rated for 800,000 gallons and 1–3 bathrooms. Paired with the Harmony above, it covers two of the three jobs, which is a good fit if you already have a pitcher or fridge filter for drinking water. The downside is two orders instead of one, and Aquasure's 5-year extended warranty only applies if you activate it online within 60 days. Check price on Amazon
Want the most serviceable setup? Build it yourself. Pair the AFW Fleck 5600SXT 48k with upflow carbon filter with the APEC ROES-50 under-sink RO. APEC's listing cites NSF/ANSI 58 and 372 certifications. That covers the same three jobs on a common Fleck valve, which any water treatment supplier can service. The downside is two separate orders and two sets of instructions, and the RO is rated 50 GPD rather than 75. Check price on Amazon
Verdict
The Signature Elite works best when you'd have bought all three pieces anyway. For a chlorinated city-water home that wants soft water and RO drinking water, the Signature Elite puts the parts in the right order in one box with one company to call. Register the warranty right away and size it from your own hardness test, not the listing's bathroom count. The version currently in stock on Amazon is rated for 32,000 grains, so a larger family on hard water should hold out for the 48,000-grain model. If you don't need all three parts, buy only the one you need. Check price on Amazon