CircuPool Universal40
#7 in Large PoolsFull review
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.
Amazon $1,295$1,295
The CircuPool Universal40 is the better salt chlorinator overall, rated 3.3 to 2.9. The CircuPool Universal40 leads on value, features and cell cost. The CircuPool CORE35 wins on warranty. The CircuPool Universal40 costs $300 less ($1,295 vs $1,595).
CircuPool CORE35
#17 in Large PoolsFull review
The simplest CircuPool to install yourself on pools up to 35,000 gallons, with a longer full warranty than the RJ line, but no salt readout.
Amazon $1,645 CircuPool $1,595$1,595
Prices were last checked October 27, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the CircuPool Universal40 for value ($1,295 for 1.8 lb of chlorine a day ($719 per lb/day) vs $1,595 for 1.4 lb of chlorine a day ($1,139 per lb/day)), features (Salt level readout, cold-water shutoff, flow sensing, boost mode vs Cold-water shutoff, flow sensing, boost mode) and cell cost (Replacement cell $649 ($361 per lb/day) vs Replacement cell $737 ($526 per lb/day)).
- Choose the CircuPool CORE35 for warranty (2-year cell, 2-year control center warranty vs 1-year cell, 1-year control center warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large pools salt chlorinator; a clear win is highlighted. How we rank explains each one.
| Factor weight | CircuPool Universal40 | CircuPool CORE35 |
|---|---|---|
| Overall rating | 3.3/5 | 2.9/5 |
| Value 30% | 71 $1,295 for 1.8 lb of chlorine a day ($719 per lb/day) | 48 $1,595 for 1.4 lb of chlorine a day ($1,139 per lb/day) |
| Cell cost 20% | 90 Replacement cell $649 ($361 per lb/day) | 69 Replacement cell $737 ($526 per lb/day) |
| Warranty 20% | 0 1-year cell, 1-year control center warranty | 25 2-year cell, 2-year control center warranty |
| Features 20% | 55 Salt level readout, cold-water shutoff, flow sensing, boost mode | 30 Cold-water shutoff, flow sensing, boost mode |
| Certification 10% | 0 Not certified to NSF/ANSI 50 | 0 Not certified to NSF/ANSI 50 |
Specifications
| CircuPool Universal40 | CircuPool CORE35 | |
|---|---|---|
| Output | ||
| Pool type | In-ground | In-ground |
| Rated pool size (maker) | 40,000 gal | 35,000 gal |
| Chlorine output | 1.8 lb/day | 1.4 lb/day |
| Salt level | 3,000 to 4,000 ppm (ideal 3,500) | 3,000 to 4,000 ppm (ideal 3,500) |
| NSF/ANSI 50 certified | No | No |
| Cell | ||
| Replacement cell | UL40-2200-4A-1RC | CORE35-4300-8A-1RC |
| Replacement cell price | $649 | $737 |
| Self-cleaning | Yes | Yes |
| Plumbing size | 2 in | 2 in |
| Controls | ||
| Salt level readout | Yes | No |
| Flow sensing | Flow switch | Flow switch |
| Cold-water shutoff | Yes | Yes |
| Boost mode | Yes | Yes |
| Wi-Fi | No | No |
| Voltage | 115/230 V | 115/230 V |
| Warranty and models | ||
| Warranty | 1 years | 2 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. | Sold as an 8-year limited warranty, prorated: parts free in years 1-2, then supplied at 40% (year 3), 60% (year 4) and 80% (years 5-8) of base price. No labor or shipping. DIY installation keeps the warranty. Commercial use: 1 year. |