Luminor Blackcomb LB5-201
#4 in Over 12 GPMFull review
A large home unit with a published Class A dose flow and a 3 year controller warranty, for less than Viqua’s monitored models. Add a sensor if no one tests the water.
Amazon $1,069.14$1,069.14
2.6/5
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.
- 24 GPMFlow
- NoNSF/ANSI 55
- MercuryLamp
Check price at Amazon$499.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 24 GPM rating in a compact 22 in chamber
- Flow switch runs the lamp only when water moves and for 30 minutes after, so standing water doesn’t cook
- 1 in ports for a high flow main
Cons
- An 80 W lamp claimed to treat 24 GPM with no stated dose; expect a light dose at full flow
- No published lamp life, pressure limit, alarm or warranty
- Replacement lamp listing was out of stock when checked
- 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 | 12 GPM | 2.4/5 | $259.99 |
| HQUA TWS-24S (this one) | 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 | TWS-24S |
|---|---|
| Disinfection | |
| Rated flow | 24 GPM |
| NSF/ANSI 55 | No |
| Lamp | Mercury |
| Lamp power | 80 W |
| Build | |
| Chamber | 304 stainless steel |
| Ports | 1 in |
| Voltage | 120 V |
Alternatives in this flow
Viqua VP600
#5 in Over 12 GPMFull review
A plain high flow Viqua for large homes that don’t need a sensor, at well under the price of the certified PRO units. Add the VP600M if you want monitoring.
Amazon $1,230$1,230
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
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