Quick Answer: “Pentair water softener” isn’t one product — it’s three separate Pentair-badged tiers that the company doesn’t publish a price for anywhere. The OMNIFILTER Cabinet Softener Series (26,000–40,000 grain) is now marked discontinued on Pentair’s own site. The 5600SXT Series is built on Pentair’s own Fleck SXT valve — the exact valve independent assemblers sell for about $650–$900 — but Pentair’s own-badged units (items 4005289–4005291, 11K/17K/23K grain) are sold only to plumbing wholesalers behind a trade login. Pro Elite is the dealer-installed premium tier, WQA-certified to NSF/ANSI 44 and 372 plus CSA B483.1, with no public specs at all. If you want soft water with a real published price, Pentair’s own dealer-only softener brand, RainSoft, or an independent Fleck-valve build, are what you’ll actually end up buying.
This guide decodes all three Pentair-branded softener tiers — what each one is, why none of them have a price, and which Pentair-adjacent option (RainSoft, or an independent system built on the same valve Pentair itself makes) is worth your money in 2026.
The three Pentair-branded softeners, decoded
| Tier | Grain capacity | Certifications | How you buy it | Status (2026) |
|---|---|---|---|---|
| OMNIFILTER Cabinet Softener | 26K / 32K / 36K / 40K | WQA-certified NSF/ANSI 44 & 372 | Dealer locator only | Discontinued |
| 5600SXT Series | 11K / 17K / 23K (items 4005289–91) | None listed on the product page | Trade/wholesaler login (e.g. Pace Supply) or “Contact a Dealer” | Active, trade-only |
| Pro Elite | Not published | WQA-certified NSF/ANSI 44 & 372, CSA B483.1 | Authorized dealer install only | Active, dealer-only |
Every row in that table ends the same way: no add-to-cart button, no listed price. That’s consistent with how Pentair handles its whole water-treatment business — the same pattern our Pentair water filter guide documents for the discontinued Pelican line, where the only channel left with a published price is Pentair’s component brands (Pentek cartridges, OMNIFilter housings) sold individually on Amazon, not complete systems.
OMNIFILTER Cabinet Softener Series — discontinued
Pentair OMNIFILTER Cabinet Softener (26K–40K grain)
- Four grain sizes (OM26KCS, OM32KCS, OM36KCS, OM40KCS) shipped as a single cabinet unit — tank, valve and brine tank combined, with a 12-volt wall transformer and drain kit included.
- Smart Reserve Technology anticipates daily household usage rather than regenerating on a fixed schedule, the same demand-based approach used across the category.
- WQA-tested and certified to NSF/ANSI Standard 44 (softening performance) and 372 (lead-free compliance) — real, independently verified certifications, unlike the uncertified 5600SXT listing below.
- Pentair's own product page now carries a "Discontinued" label — this was Pentair's most consumer-friendly, all-in-one softener, and it's the one the company pulled.
Softener salt is heavy, recurring, and easy to run short on — Amazon Prime ships 40-lb bags free in two days, so a near-empty brine tank doesn’t turn into a week of hard water. Try it free for 30 days.
If you already own an OMNIFILTER cabinet softener, Pentair’s discontinuation doesn’t orphan it outright — parts and resin remain available through the same trade channels covered below — but a new purchase of this exact tier is no longer realistic for most shoppers.
5600SXT Series — the trade-only Fleck
Pentair 5600SXT Series (11K / 17K / 23K grain)
- Built on the Fleck 5600 SXT valve — the exact platform our Fleck water softener guide covers as the industry's most-used metered softener head.
- Three tank sizes: 1.0 cu ft / 11K grain (9"x48"), 1.5 cu ft / 17K grain (10"x54"), and 2.0 cu ft / 23K grain (12"x52").
- Pentair's own product page lists item numbers and tank dimensions but no NSF/ANSI certification and no price — it routes shoppers to "Contact a Dealer" or a "Buy Locally" locator instead.
- The only confirmed pricing channel found in this review is a trade/wholesaler login (Pace Supply and similar plumbing suppliers) — not a consumer checkout.
The honest framing here: this is the same valve technology that makes an independently assembled system like an AFWFilters or DuraWater build a genuinely good published-price buy at roughly $650–$900. Pentair putting its own name directly on that valve doesn’t unlock a better deal — it moves the exact same hardware behind a trade login instead.
Pro Elite — the dealer-only premium tier
Pentair Pro Elite Professional Series
- Marketed as a continuous whole-home softening system with a digital controller that adjusts regeneration to measured water usage and retains its settings through a power outage.
- Carries real, verified certifications — WQA testing to NSF/ANSI Standards 44 and 372, plus the Canadian CSA B483.1 standard — a stronger certification story than the uncertified 5600SXT listing.
- Pentair publishes no grain capacity, model number, or price anywhere for Pro Elite. Every call to action is "Find a Dealer" or "Contact Us."
- Positioned above both the OMNIFILTER and 5600SXT tiers, but with less public information than either — a step further into dealer-only territory than Pentair's own trade-channel 5600SXT.
Functionally, Pro Elite competes with RainSoft — Pentair’s other, more established dealer-only softener brand — more than it competes with Pentair’s own 5600SXT. Whether you call a RainSoft dealer or a Pro Elite installer, you’re buying the same thing: a professional water test, a sized system, and a local install relationship, not a published spec sheet you can compare before the appointment.
Pentair’s softener tiers vs the published-price alternatives
| System | Grain capacity | Certification | Published price | How you buy it |
|---|---|---|---|---|
| Pentair OMNIFILTER (discontinued) | 26K–40K | NSF/ANSI 44 & 372 | None, ever | N/A — discontinued |
| Pentair 5600SXT (own-badged) | 11K–23K | None listed | None — trade login only | Wholesaler account or dealer |
| Pentair Pro Elite | Not published | NSF/ANSI 44 & 372, CSA B483.1 | None | Dealer install only |
| RainSoft EC4/EC5 (Pentair-owned) | Dealer-sized | Lifetime warranty, no NSF cert published | None — $4,000-$9,000+ reported installs | Dealer only |
| AFWFilters/DuraWater, Fleck 5600SXT-based | 32K–80K | NSF/ANSI 44 (varies by assembler) | ~$650-$900 | Direct online purchase |
| SpringWell SS1 | 32K | Lifetime tank/valve warranty | ~$1,495 | Direct online purchase |
The pattern across every Pentair-badged row is identical: real hardware, sometimes real certifications, and never a public number. The only way to get a published price for softening built on the exact valve Pentair owns is to buy it from someone other than Pentair.
Bottom line
Pentair genuinely makes three different self-branded water softeners — OMNIFILTER (now discontinued), the 5600SXT (its own badge on the Fleck valve it has owned since 1995, sold trade-only), and Pro Elite (dealer-installed, the best-certified of the three but the least documented). None of them has a consumer price. If you want Pentair’s hardware with a number attached before you buy, your realistic options are an independent Fleck 5600SXT build from a company like AFWFilters at roughly $650–$900, or Pentair’s own dealer-only softener brand, RainSoft, where reported installs run $4,000 to $9,000 and up. Either way, the “Pentair water softener” you end up with almost never has the word Pentair on the invoice.