HQUA TWS-24S
#6 in Over 12 GPMFull review
A cheap high flow unit for a large home that wants a UV backstop in a small space. The rating is unverified, so size it generously.
Amazon $499.99$499.99
2.1/5
A low cost, mercury free UV stage for a home that already filters its water. A new product with little track record, so test the water after installing it.
- 13 GPMFlow
- NoNSF/ANSI 55
- LEDLamp
- 1 yearWarranty
Check price at Amazon$269.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- No mercury lamp to change; the LED module runs only while water flows
- Status light shows standby, treating and end of life at a glance
- Compact 14 in housing mounts on a wall in a small space
- The cheapest LED unit here
Cons
- No UV dose for the 13 GPM rating, and the Amazon copy says 12
- The whole unit is replaced at end of life, and Purcooflow suggests doing it after 5,000 hours of flow
- Not NSF certified
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 | WHF25V |
|---|---|
| Disinfection | |
| Rated flow | 13 GPM |
| NSF/ANSI 55 | No |
| Lamp | LED |
| Lamp life | 8,000 hours |
| Monitoring | |
| UV intensity sensor | No |
| Lamp change countdown | No |
| Shutoff valve | No |
| Build | |
| Ports | 0.8 in |
| Maximum pressure | 90 psi |
| Voltage | 120 V |
| Warranty | 1 year |
| Released | 2026-09 |
Alternatives in this flow
Bluonics 110W UV 24 GPM
#7 in Over 12 GPMFull review
The budget way to put UV on a large home’s main line. It covers the flow on paper, but without a sensor you’re trusting the lamps and your maintenance.
Amazon $485$485
iSpring UVF50 LED
#8 in Over 12 GPMFull review
The larger of iSpring’s LED units, for a home that wants mercury free UV with 1 in plumbing. As with all LED units here, little about its dose is published.
Amazon $499.99$499.99
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