O3 Waterworks Smart Laundry System +PLUS
- Washer
- Remote
- Freestanding
- Stainless Steel
An ozone add-on that installs on an existing washer to cut detergent and hot water use and lift stubborn odors, not a standalone washing machine.
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How it ranks among the 25 washers we track
4.2★ across 7 Amazon ratings, Bayesian-smoothed toward the category average.
7 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 25 washers we track - how the scorecard works · full washers data report. Confidence: limited - limited rating history.Last refreshed Jun 19, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The O3 Waterworks Smart Laundry System +PLUS is an ozone water add-on that installs inline on an existing washing machine via stainless steel hoses, not a washing machine itself. It infuses cold wash water with ozone to cut down on detergent and hot water use.
Despite sitting in a Washers category, this is an accessory that installs on any washing machine rather than a standalone unit. It ships with a wireless remote offering Normal, Boost and No O3 modes, and built-in sensors reportedly monitor water flow, air temperature and humidity to adjust ozone output automatically.
- Wireless remote: Normal, Boost, No O3 modes
- Automatic sensor-based O3 adjustment
- Installs via stainless steel hoses on any washer
- Cold water operation
What buyers say
From Amazon customer reviews.
Reviewers reported real relief from skin irritation after switching, and multiple people said it eliminated persistent odors, including pet pee pad smell that used to require repeated washes with hot water and sanitizer. One reviewer had ongoing leaks the company could not resolve, and another said it works well but did not deliver the whitening they expected.
Strengths and trade-offs
Drawn from this product's published specifications.
- Removes stubborn odors like pet bedding smell
- Works in cold water, cutting hot water use
- Wireless remote with three O3 output modes
- Installs on an existing washing machine
- Does not eliminate the need for detergent
- One reviewer experienced unresolved leaks
- Did not add whitening beyond regular detergent for one reviewer
Performance notes
Sensors are said to monitor water flow, air temperature and humidity to adjust O3 output automatically, and Boost mode raises concentration to about 1.0 ppm for heavily soiled loads versus 0.5 ppm in Normal mode. Reviewer experience points to real odor removal, including pet bedding that previously needed repeated hot washes with sanitizer, alongside reduced detergent amounts. One reviewer dealt with unresolved leaks from the unit.
Specifications
| Brand | O3Waterworks |
|---|---|
| Model | LM301 |
| Dimensions & fit | |
| Item Dimensions D x W x H | 11.9 × 2.6 × 7 inches |
| Item Depth | 11.9 inches |
| Capacity & performance | |
| Cycle Options | Normal, Water Plus |
| Construction & materials | |
| Material Type | Carbon Fiber, Stainless Steel |
| Laundry Appliance Drum Material | Stainless Steel |
| Finish Types | Chrome |
| Color | Black |
| Compatibility & installation | |
| Installation Type | Freestanding |
| Included components | |
| Included Components | Power Cord |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Control Type | Remote |
| Additional Features | Auto Dose, High Efficiency |
| Recommended Uses For Product | Residential |
| Access Location | Front Load |
| Operation Mode | Semi Automatic |
Other O3Waterworks washers
How it compares
This product against the closest alternatives we track in washers.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| O3 Waterworks Smart Laundry System +PLUSThis product | 4.2 / 5 | 7 | 2.7 / 5 |
| Kenmore 4.5 cu. ft. Front Load Washer with Stain Removing Steam TreatmentKenmore | 4.3 / 5 | 98 | 4.0 / 5 |
| Auertech Portable Washing MachineAuertech | 4.3 / 5 | 3,900 | 3.9 / 5 |
| Amana NTW4516FW 3.5 Cu. Ft. White Top Load WasherAmana | 4.3 / 5 | 78 | 3.9 / 5 |
| Full-Automatic Washing Machine 25 lbs Portable Washer 10 Wash Program & 8 Water Level…Krib Bling | 4.3 / 5 | 288 | 3.9 / 5 |
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Questions about the O3Waterworks LM301
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the O3 Waterworks system replace laundry detergent?
No. One reviewer stated plainly that detergent is still needed, though most reviewers reported using noticeably less of it.
What is Boost mode for?
Boost mode raises O3 concentration to about 1.0 ppm for heavily soiled loads compared with the 0.5 ppm Normal mode, per the listing.
Will this whiten clothes like bleach?
One reviewer noted they expected more whitening from the O3 and did not see it, so it should not be relied on for whitening.