HQUA OWS-12
#3 in Up to 12 GPMFull review
A bare bones budget UV for a cabin or a well that already passes bacteria tests. Too little is published to rely on it for a known problem.
Amazon $199.99$199.99
2.4/5
A compact budget unit for a tight utility room, with cheap lamps. Like other budget units it tells you little about the dose.
- 12 GPMFlow
- NoNSF/ANSI 55
- MercuryLamp
- 1 yearWarranty
Check price at Amazon$259.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Short 21 in chamber, about half the length of most 12 GPM units, fits where a long tube won’t
- Replacement lamps cost about $35
- 10 year chamber warranty
- Comes with a spare lamp
Cons
- No UV dose for the 12 GPM rating
- No published pressure limit, alarm or monitoring
- Ballast covered only 1 year and lamps only 6 months
- Not NSF certified
The HQUA TWS family
Every HQUA TWS model we rank, smallest first. Ratings compare each against its own flow.
| Model | Flow | Rating | Price |
|---|---|---|---|
| HQUA TWS-12 (this one) | 12 GPM | 2.4/5 | $259.99 |
| HQUA TWS-24S | 24 GPM | 2.6/5 | $499.99 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its flow. How we rank explains each one.
Specifications
| Model number | HQUA-TWS-12 |
|---|---|
| Disinfection | |
| Rated flow | 12 GPM |
| NSF/ANSI 55 | No |
| Lamp | Mercury |
| Lamp power | 55 W |
| Lamp life | 9,000 hours |
| Build | |
| Ports | 0.8 in |
| Voltage | 120 V |
| Warranty | 1 year |
Alternatives in this flow
Viqua VH200
#4 in Up to 12 GPMFull review
A dependable small home or cabin unit from the biggest name in residential UV, with a real controller warranty. Larger homes need the VH410 or a monitored system.
Amazon $685$685
Geekpure GP-UV55W 12 GPM
#6 in Up to 12 GPMFull review
The lowest cost way to add a UV lamp to a filtered well system, with three years of lamps included. Little is published beyond that.
Amazon $189.99$189.99
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