Brand facts · read November 2026

RainSoft: what it sells, how it sells, and what it says

Facts from RainSoft’s own pages and public certification listings. We don’t rate or rank brands.

Short answer

RainSoft sells whole-house filters, salt-based softeners and under-sink reverse osmosis through local dealers. 2 of its products appear in a public NSF, WQA or IAPMO certification listing, 1 of them for PFOA and PFOS (two PFAS “forever chemicals”) reduction. RainSoft is owned by Pentair.

RainSoft’s website and public NSF/WQA listings, read November 2026 · Sources

RainSoft’s website ↗Compare all brands

01 · Products

What RainSoft sells

Line	Price	Examples
Whole-house filters	Not publisheddealer quote	Whole-House Carbon Filtration System; EC4 OxyTech (iron filter)
Salt-based softeners	Not publisheddealer quote	EC5; EC5-CAB; TC-M Series
Under-sink reverse osmosis	Not publisheddealer quote	Ultrefiner Elite; Ultrefiner II

Names and prices as shown on RainSoft’s site, read November 2026. Ranges span sizes and models; sale prices come and go. Check the brand for today’s price.

02 · Listings

Public certification listings

Products we found in NSF’s or WQA’s public directories, with the standards they’re listed under. NSF/ANSI 53 and 58 listings that name PFOA and PFOS, the two PFAS “forever chemicals” with federal limits, are the ones the U.S. Environmental Protection Agency (EPA) and NSF point to. What the numbers mean.

Product	Listed by	Standards	PFOA/PFOS
EC5 water conditioning system (salt-based softener)	NSF	NSF/ANSI 44
Ultrefiner Elite under-sink reverse osmosis system	NSF (42, 53, 58, 401); IAPMO R&T (53, Total PFAS)	NSF/ANSI 42, NSF/ANSI 53, NSF/ANSI 58, NSF/ANSI 401	Listed

03 · In their words

What RainSoft says

"RainSoft Is In Nearly 1,000 Home Depot Stores Nationwide"

RainSoft · source

04 · Warranty

Warranty and guarantee, in RainSoft’s terms

Tanks: EC5: treatment tank, valve, salt container, electrical components and Ion-X 2000 / Ion-X 100 resins warranted against manufacturing defects for the lifetime of the first purchaser at retail. TC series: tank, valve and salt container lifetime of first purchaser; Ion-X 34 resin 10 years.
Valve: Lifetime of first purchaser (EC5 and TC series)
Electronics: EC5: lifetime of first purchaser. TC series: 5 years, then pro-rata for 5 more years. Ultrefiner Elite electrical components: 12 months.
Filters or housings: Ultrefiner Elite: storage tank housing, faucet and unibody control for as long as the first purchaser owns it; housing sumps covered provided plastic housings are replaced every 10 years; reverse osmosis (RO) membrane 18 months pro-rated (1/18 credit per unused month).

05 · At a glance

About RainSoft

Owner: Pentair (Pentair plc). Pentair completed its acquisition of Aquion, Inc. in February 2019 for $163.4 million in cash, net of cash acquired. RainSoft’s own timeline lists '2019 Pentair Acquisition', and rainsoft.com links to Pentair’s privacy notice.
Headquarters: Roselle, Illinois (RainSoft says it moved to a Roselle facility in 2016; products are 'assembled and shipped from our Chicago factory')
How it sells: Sold and installed through independent authorized RainSoft dealers after a free in-home water test. RainSoft also says it is in nearly 1,000 Home Depot stores as Home Depot’s preferred water treatment provider. No online store or published prices on rainsoft.com.
Installation: Systems are installed by authorized RainSoft dealers after an in-home water test; no DIY path offered on the brand site.

Does RainSoft fit your water?

What you need depends on your water, not the brand: hardness decides whether a softener is worth it, and PFAS or chloramine decide which filter. Look up your city first, then compare.

Size a softener Compare all brands

Sources

Everything on this page is read from RainSoft’s own pages or public certification directories. Claims are RainSoft’s, in its words. We don’t test products.