Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735)
Best for a Pentair automation pad — The current Plus-line cell that replaces the discontinued IC40 — the SWG most pool pros trust and the cleanest match if your pad is already Pentair, for pools up to 40,000 gallons. Buy it through a dealer, not Amazon (see the A00709 firmware caveat)
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⚔️ Matchup — Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735) vs Hayward W3T-CELL-15 TurboCell (In-Ground, 40,000 gal)
⚔️ Matchup — Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735) vs Hayward AquaRite (W3AQR15) Salt Chlorine Generator
Specs
| Max pool size | 40,000 gal |
| Chlorine output | 1.4 lb/day |
| Cell life | ~10,000 hr (~5 yr) |
| Cell cost/yr | ~$300 (cell ~$1,500) |
| Fits | Pentair IC40 → Plus40 (523735) |
| Controller | Integrated LED (salt %, output, cell life) |
| Automation | Yes (IntelliCenter/EasyTouch) |
| Warranty (online) | 1 yr parts only. Pentair's clause is catalog-wide and names the channel: 'Products purchased from the internet, including Authorized Pentair Online Resellers, receive a one-year parts only warranty.' Coverage SURVIVES online but drops to this — buying from an authorised online reseller does not help. |
| Warranty (via dealer) | 3 yr dealer-installed; some IntelliChlor models run a 3-year-or-10,000-hour clock, whichever lands first |
| Best for | Pentair pads & automation |
Pros
- The current IntelliChlor Plus40 (part 523735) — a drop-in for the now-discontinued IC40, so you're buying the live generation, not old stock
- Integrates natively with Pentair IntelliCenter/EasyTouch automation — the cleanest choice if your pad is already Pentair
- Highest-quality reputation among pros (Swimming Pool Steve names Pentair the top SWG brand) with a nationwide dealer and parts network
- Self-cleaning cell with a clear LED readout of salt level, output %, and cell life
Cons
- Its early-2025 batch had a firmware bug (Pentair bulletin A00709) that threw false CHECK CELL / SYS OFF alerts and tanked the early Amazon reviews — but it only affected units made before Oct 20, 2025 (firmware 1.003), and was fixed after (1.004). It's now July 2026, so current stock is past it; the 3.6★ is historical. Still worth a glance at the manufacture date on any marketplace unit.
- The priciest replacement cell here (~$1,500–1,800 OEM) — and at ~10,000 hr that cell cost is what drives the 10-year total, the single biggest reason a salt pool gets expensive
- Pentair limits/voids warranty on online or self-installed units, and counterfeit cells are common on marketplaces — another reason to buy through an authorized dealer
Early failure is the dominant report — units dead within days to three months, several with a sensory-module error the owners say support treats as known. Running alongside it is a warranty problem specific to HOW you buy: multiple owners say a claim was refused or fought because the cell came from Amazon rather than an authorised dealer. One install catch worth knowing before you order: it needs 12 to 18 inches of straight pipe ahead of the cell for flow sensing, which the listing does not mention.
44 critical reviews against a 119 base — a 37% critical share, the highest on this page; of the first 10 cards about 5 are early failure and 3 are the warranty-channel problem · critical reviews read August 2026
“It has worked perfectly with no issues. Very happy with the control panel and how it shows the pool temp and other info.”— Shannon, Amazon · Verified owner
FAQ
Who is the Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735) for?
Your pad is already Pentair and you want the tightest automation integration — the current Plus40 cell (~$1,749). Its cell is the priciest here to feed, and its 3.6★ is the early-2025 firmware batch, fixed on current stock.
What do owners say about the Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735)?
3.3★ across 143 owner ratings (Amazon, read August 2026). What owners complain about: Early failure is the dominant report — units dead within days to three months, several with a sensory-module error the owners say support treats as known. Running alongside it is a warranty problem specific to HOW you buy: multiple owners say a claim was refused or fought because the cell came from Amazon rather than an authorised dealer. One install catch worth knowing before you order: it needs 12 to 18 inches of straight pipe ahead of the cell for flow sensing, which the listing does not mention.
What is the warranty on the Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735)?
1 yr parts only. Pentair's clause is catalog-wide and names the channel: 'Products purchased from the internet, including Authorized Pentair Online Resellers, receive a one-year parts only warranty.' Coverage SURVIVES online but drops to this — buying from an authorised online reseller does not help.
Cell cost per year, compared → · Size your pool first → ·All pool gear →
Data last verified: August 2026. Ratings are real, dated reads — never scraped or invented. Full methodology and monetization disclosure: how we test.