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)
Contender — The Best Pentair IntelliChlor IC40 Replacement Cell (2026): Aftermarket vs OEM
Contender — The Best Salt Water Chlorinators of 2026 — and the Truth About Whether Salt Is Cheaper
⚔️ 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
Sold and shipped by Dolce Calma · read 2026-10-16
Specs
| Max pool size | 40,000 gal |
| Chlorine output | 1.4 lb/day |
| Cell life | ~10,000 hr (~5 yr) |
| Cell cost/yr | ~$310 (cell ~$1,550) |
| Fits | Pentair IC40 → Plus40 (523735) |
| Controller | Integrated LED (salt %, output, cell life) |
| Automation | Yes (IntelliCenter/EasyTouch) |
| Warranty (online) | 1 yr parts only, per Pentair's own warranty page: 'Products purchased from the internet, including Authorized Pentair Online Resellers, receive a one-year parts only warranty.' The sources conflict: an older Pentair warranty text still reproduced by retailers gives IntelliChlor cells bought online two years, parts only. And the Amazon seller on 2026-10-16 (Dolce Calma, a marketplace seller) cannot be checked against an authorized-reseller list, because Pentair publishes none we could find. |
| 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 owner score is down from 3.6 in July to 3.3★ across 176, and all ten of the newest critical reviews (2026-09-08 to 2026-10-08) are failures — several on a second or third warranty cell — even though Pentair fixed the early firmware bug (bulletin A00709, units made before Oct 20, 2025) on later units, so that fix does not explain the record and the cause is not established
- The priciest replacement cell here (~$1,550 on Amazon, list $1,819) — and at ~10,000 hr that cell cost is what drives the 10-year total, the single biggest reason a salt pool gets expensive
- Bought online, Pentair's own page gives it one year, parts only — the three years needs a dealer and professional installation — and an older Pentair text still on retailer sites says two years for online IntelliChlor cells. The Amazon seller (Dolce Calma on 2026-10-16) cannot be checked against an authorized-reseller list, and owners in the critical tail report claims refused because the cell came from Amazon
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.
60 written critical reviews (the critical filter's count) as of 2026-10-16; the histogram puts 37% of the 176 ratings at one star. The ten newest critical reviews (2026-09-08 to 2026-10-08) are all early failures, and several describe a second or third replacement cell failing the same way · critical reviews read 2026-10-16
“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 (~$1,550). Its cell is the priciest here to feed, and its 3.3★ owner score is down from 3.6 in July even as its base has grown.
What do owners say about the Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735)?
3.3★ across 176 owner ratings (Amazon, read 2026-10-16). 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.
Who sells the Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735) on Amazon, and can it be returned?
Sold and shipped by Dolce Calma, when we read the listing on 2026-10-16. Sellers and return terms can change, so check both on the listing before you buy.
What is the warranty on the Pentair IntelliChlor Plus40 Salt Chlorine Generator (523735)?
1 yr parts only, per Pentair's own warranty page: 'Products purchased from the internet, including Authorized Pentair Online Resellers, receive a one-year parts only warranty.' The sources conflict: an older Pentair warranty text still reproduced by retailers gives IntelliChlor cells bought online two years, parts only. And the Amazon seller on 2026-10-16 (Dolce Calma, a marketplace seller) cannot be checked against an authorized-reseller list, because Pentair publishes none we could find.
Record
- — Audit read: 3.3 stars across 176 ratings (was 3.2 across 157 on 2026-09-15). The 19 ratings in between averaged at least 3.25 stars, but the ten newest written critical reviews are all failures. $1,553.99 on Amazon (list $1,819), sold and shipped by a marketplace seller, Dolce Calma; was $1,589.99 on 2026-09-15.
- — Warranty re-read. Pentair's own page gives a cell bought online one year, parts only; an older Pentair warranty text still on retailer sites gives online IntelliChlor cells two years, parts only. The two conflict, and Pentair publishes no list of authorized online resellers we could find, so whether the Amazon seller (Dolce Calma) is one cannot be checked.
- — Amazon price re-read at $1,589.99, down from the $1,649 recorded in August; the list price is $1,819 and the listing showed 5 units left.
- — Owner rating re-read at 3.2 stars across 157, down from 3.3 across 143 in August; the 14 new ratings average about 2.2 stars. The buy box at this read was a third-party seller, Dolce Calma.
Warranty — and what changes if you buy it on Amazon
1 yr parts only, per Pentair's own warranty page: 'Products purchased from the internet, including Authorized Pentair Online Resellers, receive a one-year parts only warranty.' The sources conflict: an older Pentair warranty text still reproduced by retailers gives IntelliChlor cells bought online two years, parts only. And the Amazon seller on 2026-10-16 (Dolce Calma, a marketplace seller) cannot be checked against an authorized-reseller list, because Pentair publishes none we could find. · you are buying this on Amazon
Read it yourself: Pentair warranty document · we read it . Terms change without announcement, so treat this as a dated snapshot. How warranty works by buy path →
What we have seen it sell for
- — $1,590 recorded
- — $1,649 recorded
- — $1,749 recorded
Each date is when we recorded that price, not necessarily the day it changed — we publish what we can prove. Prices we later corrected are left out rather than shown as moves.
✓ Safety: no active recall — No active CPSC recall found for the IntelliChlor Plus40 (re-checked 2026-10-16 with a passing control: RecallTitle and ProductName queries for IntelliChlor return an empty list). Pentair's recalls on file, 21119 (2021), 07073 (2007) and 11230 (2011), are gas pool heaters and drain covers, not salt systems.
Cell cost per year, compared → · Size your pool first → ·All pool gear →
Data last verified: 2026-10-16. Ratings are real, dated reads — never scraped or invented. Full methodology and monetization disclosure: how we test.