For big pools (up to 60,000 gallons) whose owners want a DIY salt system with a salt readout; oversized and pricier than needed for a typical backyard pool.
Amazon $1,965
For owners of an aging Hayward AquaRite or similar system who want a new control box and cell for about the price of a brand-name cell, on pools up to 40,000 gallons.
- 40,000 galRated pool size
- 1.8 lb/dayChlorine output
- $649Replacement cell
- 3,000 to 4,000 ppm (ideal 3,500)Salt level
- 1 yearsWarranty
Price checked October 27, 2026. As an Amazon Associate we earn from qualifying purchases.
- Drops into the plumbing of an old Hayward AquaRite or Goldline system without cutting or gluing
- Screen shows the salt level in ppm, so you rarely need a separate salt test
- Costs about what many brand-name replacement cells do, but replaces the whole system
- Warranty is prorated after year 1 and ends after 4 years, the shortest of CircuPool’s main lines
- No Wi-Fi, app or named automation system
The CircuPool Universal family
Every CircuPool Universal model we rank, smallest first. Ratings compare each against its own pool type.
| Model | Rated pool size | Rating | Price |
|---|---|---|---|
| CircuPool Universal25 | 25,000 gal | 3.0/5 | $1,095 |
| CircuPool Universal40 (this one) | 40,000 gal | 3.3/5 | $1,295 |
| CircuPool Universal55 | 55,000 gal | 3.5/5 | $1,395 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its pool type. How we rank explains each one.
Specifications
| Model number | UL40 |
|---|---|
| Output | |
| Pool type | In-ground |
| Rated pool size (maker) | 40,000 gal |
| Chlorine output | 1.8 lb/day |
| Salt level | 3,000 to 4,000 ppm (ideal 3,500) |
| NSF/ANSI 50 certified | No |
| Cell | |
| Replacement cell | UL40-2200-4A-1RC |
| Replacement cell price | $649 |
| Self-cleaning | Yes |
| Plumbing size | 2 in |
| Controls | |
| Salt level readout | Yes |
| Flow sensing | Flow switch |
| Cold-water shutoff | Yes |
| Boost mode | Yes |
| Wi-Fi | No |
| Voltage | 115/230 V |
| Warranty and models | |
| Warranty | 1 years |
| Warranty terms | Sold as a 4-year limited warranty, prorated: parts free in year 1, then supplied at 25% (year 2), 50% (year 3) and 70% (year 4) of base price. No labor or shipping. DIY installation keeps the warranty. Commercial use: 1 year. |
Alternatives in this pool type
Hayward’s flagship salt system for large in-ground pools, best bought and installed through a Hayward dealer; it can grow into Omni app control.
Amazon $2,489.99The big IntelliChlor for pools up to 60,000 gallons, back in the US through pool dealers; the Plus60 adds a ppm salt display.
Compare
Compare the CircuPool Universal40 with any other salt chlorinator →
More from CircuPool: every CircuPool product ranked.