Review · Updated Oct 31, 2026

SpringWell WS1 / WS4 review

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Illustration

For iron, sulfur and manganese

SpringWell WS1 / WS4

$2,100 brand list price $2,625

WS1 sale price, checked Oct 31, 2026 · WS4 $2,520¹

iron: 7 ppm
hydrogen sulfide: 8 ppm
manganese: 1 ppm

Stated maximums, pH 6.5 or higher¹

Check price at SpringWell(paid link)

Water test $134.25, added at checkout, not refundable. Free shipping to the lower 48.^{2, 3}

An air-injection iron, sulfur and manganese filter for private wells, sold direct. Strong on the problems it is built for, honest about needing a water test, and weaker on independent certification and returns.

The short verdict

Good fit if a lab test shows iron up to 7 ppm, hydrogen sulfide up to 8 ppm and/or manganese up to 1 ppm, pH 6.5–10, and no bacteria problem (or you add disinfection).¹
Not a fit for bacteria on its own, nitrate, arsenic, or water outside those limits.
Watch out: no NSF listing found, and installed systems can only be returned if defective.^{3, 4}

Based on SpringWell's product pages, manuals, warranty and return policy, and NSF's certification listings, all read on Oct 31, 2026. We haven't installed this system ourselves. How we review

Water tested before it ships¹ System refunded if it doesn't fit; the test isn't
Lifetime limited warranty^{1, 5} Valves and fittings; mineral tanks 14″+ 10 yrs; head 5–7 yrs Valves & fittings; tanks 14″+ 10 yrs
DIY install keeps the warranty⁶ Or hire a plumber: the warranty applies either way
Owned by Fortune Brands⁷ Moen's parent company, since February 2024

What it is and how it works

The Whole House Well Water Filter System uses air injection oxidation: a pocket of air in the tank oxidizes dissolved iron, manganese and hydrogen sulfide so that a greensand-based media can filter them out. The system then backwashes itself. SpringWell describes it as "chemical-free".¹ This is the same principle that extension services describe as oxidation followed by filtration.⁸

It needs a power outlet (not on a switch) and a drain line; the manual includes a 50-foot drain line and sets the controller up through a phone app.⁹ There are no filter cartridges to change in the iron filter itself; SpringWell states a "10+ year media life".¹

Air pocket. Oxygen at the top of the tank turns dissolved iron, manganese and hydrogen sulfide into particles.
Particles form. What was invisible in the water becomes rust-colored specks.
Media bed traps them. Clean water leaves the bottom; a scheduled backwash flushes the particles to the drain and refreshes the air.

Stated limits

Check these against your lab test. Where the product page and the manual differ, we show both.

iron: 7 ppm
hydrogen sulfide: 8 ppm
manganese: 1 ppm

Stated maximums, SpringWell's own claims.¹

Home size: WS11–4 bathrooms; WS44+ bathrooms
Flow rate: WS112 GPM; WS420 GPM on the product page, 18 GPM in the manual
Iron (max): 7 ppm
Hydrogen sulfide (max): 8 ppm
Manganese (max): 1 ppm
pH: WS16.5–10; WS46.5–10 on the page, 6.8–10 in the manual
Pressure / temperature: 25–80 PSI, 36–120 °F

Sources: product page and installation manual.^{1, 9}

"Do not use where water is microbiologically unsafe!"

SpringWell's own note on the product page.¹ The warranty is void if the system is installed on water outside the recommended specification,⁵ one more reason to test first.

For a home with peak demand above 12 GPM (Nebraska Extension puts a 3-bedroom, 2-bath home at 12 GPM and a 4-bedroom, 3-bath home at 16 GPM¹⁰), the WS4 is the safer size.

At a glance

SpringWell WS1 / WS4 well water filter

Best for: iron, manganese and rotten-egg smell in private wells

$2,100 brand list price $2,625

+ $134.25 water test, required · WS4 $2,520²

WS1 sale price, checked Oct 31, 2026 · WS4 $2,520. Check the current price.¹

Check price at SpringWell(paid link)

The terms, in writing

Water tested before it ships; system refunded if it doesn't fit (the $134.25 test isn't)
Lifetime limited warranty on valves and fittings; mineral tanks 14″+ 10 years; electronic head 5–7 years
Returns within 6 months if uninstalled, 10% restocking fee
Free shipping to the lower 48

Terms as published by SpringWell^{1, 3, 5}

Certification: claims, not listings

The iron, sulfur and manganese figures are SpringWell's own claims. The product page names no NSF, WQA or IAPMO certification for the system, and NSF's public database showed "No Matching Products Found" for SpringWell.^{1, 4} That doesn't mean the system doesn't work; oxidation filtration is an established method. It means no independent body has listed this model's performance. (We couldn't search the WQA and IAPMO directories.)

Brand claimIron 7 · H₂S 8 · Mn 1 ppmStated by SpringWell¹
Not foundNSF listing"No Matching Products Found"⁴
Not checkedWQA, IAPMOWe couldn't search these directories

How ordering works

No lab report needed. The test is part of the order.

Order with the $134.25 test

SpringWell adds its lab test to the same checkout.¹
SpringWell reviews your results

The order waits for the lab results. If changes are needed, SpringWell contacts you.^{1, 3}
It ships, or the system is refunded

If it doesn't fit your water, the order is cancelled and the system refunded. The test isn't.¹

SpringWell doesn't ship a well system until it has seen a water test. You can buy its mail-in lab test ("Level 1 + Bacteria", 53+ contaminants, $134.25 on sale) or send your own current results. If the results show the system isn't compatible, SpringWell cancels the order and refunds it; the test itself isn't refundable.^{1, 2, 3} A state-certified lab test works too and often costs less.

Prices, Oct 31, 2026

What the WS1 adds up to at checkout, and what the other packages cost.

SpringWell order, price checked Oct 31, 2026¹

SpringWell WS1 list $2,625: $2,100
Water test, required Level 1 + Bacteria, not refundable: $134.25
Bypass valve pre-added, removable: $58.79
At checkout $2,234.25 without the bypass: $2,293.04
Install: DIY or a plumber⁶
Running costs: Power and backwash water, no cartridges⁹

WS1 / WS4 well water filter Iron, sulfur, manganese $2,100 / $2,520 list $2,625 / $3,150
WSSS1 / WSSS4 Well filter + salt-based softener $2,940 / $3,360 list $3,675 / $4,200
ULTRA UWS1 / UWS4 Well filter + carbon + salt-free conditioner $4,262 / $5,502 list $5,328 / $6,878
UV add-on Bacteria (see below) $1,036 list $1,295
Water test (required) Mail-in lab, 53+ contaminants + bacteria $134.25 list $179

Sale prices; the small line is SpringWell's own "MSRP".^{1, 2, 6, 11, 12} A bypass valve ($58.79) is pre-added to the cart and can be removed. Prices change often; check before you buy.

Bacteria: the UV add-on

The iron filter does nothing against bacteria. SpringWell sells a UV system as an add-on and claims it "kills 99.9% of bacteria and viruses".¹² We found no NSF/ANSI 55 listing for it.⁴ Extension guidance for wells with bacteria is to find and fix the source first;¹³ Ohio's health department accepts only UV certified to NSF/ANSI 55 Class A for primary disinfection.¹⁹

The UV also needs clean water to work, so it goes after the iron filter (and a softener, if your water is hard).

What SpringWell's UV manual asks for¹⁴

hardness: below 7 gpg
iron: below 0.3 ppm
manganese: below 0.05 ppm
turbidity: below 1 NTU

Hard water and the salt-free option

If your water is hard, SpringWell offers the filter with a salt-based softener or with its salt-free FutureSoft conditioner. Note that FutureSoft tolerates no iron, manganese or hydrogen sulfide at all and needs pH 7.0–9.5,¹⁵ so it only works with the iron filter in front of it. A salt-free conditioner reduces scale buildup; it doesn't soften water.

Installation

SpringWell says DIY installation keeps the warranty.⁶ You'll need to cut into the main line, run a drain line and provide an outlet; the manual lists supplies such as a bypass, connectors and a shut-off valve that aren't in the box.⁹ If you're not comfortable with that, budget for a plumber.

Cut into the main line where the water enters the house
Run a drain line for the backwash
Provide an outlet for the control head
Buy the extras: bypass, connectors and a shut-off valve aren't in the box⁹

Warranty and returns: read the fine print

What the badges say, and what the written terms say.

valves, fittings, housings, in/out heads: Lifetime
mineral tanks 14″ or larger: 10 yrs
electronic head: 5–7 yrs
returns if uninstalled, 10% fee^{1, 3, 5}: 6 mo

"Lifetime warranty"

Lifetime cover against defects on fittings, housings, valves and in/out heads; retention and mineral tanks 14″ or larger get 10 years; electronic heads get 7 years on the warranty page but 5 years on product pages.^{1, 5} The UV unit's manual gives 10 years on the reactor, 3 years on electronics and 1 year on lamps.¹⁴

The warranty is void if the system is moved or installed on water outside the specification, and filters or media not replaced on time count as "neglect", which it doesn't cover.⁵

"6-month money-back guarantee"

The return policy accepts only unused, uninstalled items in undamaged packaging, with a 10% restocking fee, and you pay return shipping. "Installed systems are not eligible for return unless determined defective".³

One FAQ on SpringWell's site still promises a "full, 100% refund";⁶ the written policy is what counts.

Who should buy it, and who shouldn't

Consider it if

a lab test shows iron, sulfur and/or manganese within its limits;
you want no cartridges and no chemicals for the iron stage;
you have power and a drain near the well line.

Look elsewhere if

you need independently certified performance;
your main problem is bacteria, nitrate or arsenic;
your iron is above 7 ppm or your pH is below 6.5;
you want the option to return an installed system.

A strong iron, sulfur and manganese filter, if your test fits

Built for iron, sulfur and manganese, and SpringWell checks your water before it ships. The catches: no NSF listing found, and an installed system goes back only if defective.^{1, 3, 4}

Illustration

For iron, sulfur and manganese

SpringWell WS1 / WS4

$2,100 brand list price $2,625 Price checked Oct 31, 2026¹

Iron ≤ 7 · H₂S ≤ 8 · Mn ≤ 1 ppm

Check price at SpringWell(paid link)

SpringWell vs. Aquasana Aquasana Rhino review Iron filter guide

A white Victorian farmhouse behind a broad old oak on a green lawn

Sources (19) · checked Oct 31, 2026

SpringWell: Whole House Well Water Filter System (WS1/WS4) product page (seen 2026-10-31)
SpringWell: Well Water Test Kit (seen 2026-10-31)
SpringWell: Shipping, returns and refunds (free shipping to the continental US only) (seen 2026-10-31)
NSF listings: NSF certified drinking water treatment units: search for SpringWell (seen 2026-10-31)
SpringWell: Warranty (seen 2026-10-31)
SpringWell: ULTRA Well Water Filter + Salt-Free combo (seen 2026-10-31)
Fortune Brands 10-K: Fortune Brands Innovations, Form 10-K for fiscal 2024 (acquisition of SpringWell, February 29, 2024; Water segment with Moen) (seen 2026-10-31)
Penn State Extension: Penn State Ext., Iron and Manganese in Private Water Systems (2025-05-29; checked 2026-10-31)
SpringWell manual: WS1/WS4 installation instructions (PDF) (seen 2026-10-31)
Nebraska Extension: Univ. Nebraska–Lincoln G2149, Planning for Water Use (May 2012; checked 2026-10-31)
SpringWell: Well Water Filter + Salt-Based Softener (seen 2026-10-31)
SpringWell: UV Water Purification System (seen 2026-10-31)
UGA Extension: UGA Ext. Bulletin 939, Water Quality and Common Treatments for Private Drinking Water Systems (2026-07-01; checked 2026-10-31)
SpringWell UV manual: Blackcomb UV manual (PDF) (seen 2026-10-31)
SpringWell: Salt-Free Water Conditioner (FutureSoft) (seen 2026-10-31)
SpringWell: Chemical Injection System (seen 2026-10-31)
SpringWell: Calcite pH Neutralizer (seen 2026-10-31)
SpringWell: Tannin Removal System (seen 2026-10-31)
Ohio Dept. of Health: Ohio Dept. of Health, UV Light for Continuous Disinfection (rev. July 2011; checked 2026-10-31)

SpringWell WS1 / WS4 review

The short verdict

What it is and how it works

Stated limits

SpringWell WS1 / WS4 well water filter

Certification: claims, not listings

How ordering works

Order with the $134.25 test

SpringWell reviews your results

It ships, or the system is refunded

Prices, Oct 31, 2026

Bacteria: the UV add-on

Hard water and the salt-free option

Installation

Warranty and returns: read the fine print

Who should buy it, and who shouldn't

Consider it if

Look elsewhere if

Other SpringWell systems for specific well problems

A strong iron, sulfur and manganese filter, if your test fits