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
The HQUA TWS-24S is the better UV water purifier overall, rated 2.6 to 2.3. The Bluonics 110W UV 24 GPM costs $14.99 less ($485 vs $499.99).
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
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 12 GPM UV water purifier; a clear win is highlighted. How we rank explains each one.
| Factor weight | HQUA TWS-24S | Bluonics 110W UV 24 GPM |
|---|---|---|
| Overall rating | 2.6/5 | 2.3/5 |
| Value 25% | 65 $52.08 per GPM ($499.99, 9.6 GPM at 40 mJ/cm², from 24 GPM at an unstated dose taken as 16) | 66 $50.52 per GPM ($485, 9.6 GPM at 40 mJ/cm², from 24 GPM at an unstated dose taken as 16) |
| Certification 20% | 0 not NSF/ANSI 55 certified, and no UV dose published | 0 not NSF/ANSI 55 certified, and no UV dose published |
| Monitoring 20% | 50 monitoring not published (neutral score used) | 30 lamp failure alarm |
| Lamp life 10% | 50 lamp life not published (neutral score used) | 6 9,000 hour mercury lamp |
| Warranty 25% | 0 warranty not published, scored as none | 0 1-year warranty |
Specifications
| HQUA TWS-24S | Bluonics 110W UV 24 GPM | |
|---|---|---|
| Disinfection | ||
| Rated flow | 24 GPM | 24 GPM |
| NSF/ANSI 55 | No | No |
| Lamp | Mercury | Mercury |
| Lamp power | 80 W | 110 W |
| Lamp life | - | 9,000 hours |
| Monitoring | ||
| UV intensity sensor | - | No |
| Lamp failure alarm | - | Yes |
| Shutoff valve | - | No |
| Build | ||
| Chamber | 304 stainless steel | 304 stainless steel |
| Ports | 1 in | 1 in |
| Maximum pressure | - | 125 psi |
| Voltage | 120 V | 120 V |
| Warranty | - | 1 year |