Systems Aquasure Harmony
Aquasure Harmony 48,000 (AS-HS48D)
Aquasure's 48,000-grain metered softener sells for $629.99. The manual rates the control valve at 20 gpm continuous, but no system flow, salt dose or certification is published.
Key specs at a glance
Sold as
48,000 grains
Salt dose not published
At efficient salt
not published
No capacity-by-dose table
Salt efficiency
not published
No grains-per-pound figure
Service flow
not published
Valve only: Valve alone: 20 gpm continuous at 15 psi drop, 26 gpm peak
Max hardness
not published
20–125 psi
Price
$629.99
Seller's store price, checked Oct 22
Where to buy · Aquasure Harmony: $629.99 on the seller's site, checked Oct 22, 2026. No retailer link yet.
Capacity by Salt Dose
No capacity-by-dose table published. Aquasure gives the 48,000-grain rating without the salt dose behind it. Softeners in our database that do publish one deliver well under half their top figure at the lowest dose. Why that matters.
Our Read
The Harmony is the cheapest whole-house softener in the database by a wide margin, and it gets its own threads in r/WaterTreatment. The short warranty and missing salt data are the trade-offs. Read the 20 gpm figure as the valve’s capacity, not the system’s.Bottom line: The value pick for a DIY install on city water, if you accept maker-only figures and a 1-year warranty unless you register.
Maker Claims vs the Record
Valve rated 20 gpm continuous, 26 gpm peak. Aquasure manual
That's the control valve alone. No system service flow (valve + resin bed) is published or certified.
Expect less than 20 gpm through the full softener. Certified 1.5 cu ft systems list about 9.5–11 gpm.
48,000 grains. Aquasure product page
No salt dose given for the rating. Aquasure manual
Aquasure doesn't say which salt dose the 48,000 figure assumes. Softeners that publish a table reach their top figures only at high doses.
Certification Record
| Status | No listing found |
|---|---|
| What it covers | No NSF/ANSI 44, WQA or IAPMO listing found |
Specifications
Performance
- Valve flow
- Valve alone: 20 gpm continuous at 15 psi drop, 26 gpm peak Aquasure manualchecked 2026-10-22
Water and install limits
- Pressure
- 20–125 psi Aquasure manualchecked 2026-10-22
- Plumbing
- 1 in. or ¾ in. NPT Aquasure product pagechecked 2026-10-22
- Resin tank
- 10 × 54 in. (43–52K sizes) Aquasure manualchecked 2026-10-22
- Household
- 4–5 bathrooms, up to 5–6 people Aquasure product pagechecked 2026-10-22
Warranty and price
- Warranty
- 1 year; 5 years if registered within 60 days; resin excluded with iron, manganese or chlorine Aquasure manualchecked 2026-10-22
- Price
- $629.99 Aquasure product pagechecked 2026-10-22
What We Couldn't Verify
- Resin volume (third parties say 1.5 cu ft; Aquasure's page doesn't).
- Salt dose and efficiency.
- Performance in your home, which depends on your water chemistry and use. We haven't tested this system ourselves.
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