Viqua PRO20
#2 in Over 12 GPMFull review
The certified pick for a large home or a small business on a private well. It costs a lot, but the dose is measured and certified.
Amazon $3,840$3,840
The Viqua PRO20 is the better UV water purifier overall, rated 3.6 to 2.3. The Viqua PRO20 leads on certification, monitoring and warranty. The Bluonics 110W UV 24 GPM costs $3,355 less ($485 vs $3,840).
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.
Which should you buy?
- Choose the Viqua PRO20 for certification (NSF/ANSI 55 Class A vs not NSF/ANSI 55 certified, and no UV dose published), monitoring (UV intensity sensor, lamp failure alarm, shutoff valve, lamp change countdown vs lamp failure alarm) and warranty (5-year warranty vs 1-year warranty).
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 | Viqua PRO20 | Bluonics 110W UV 24 GPM |
|---|---|---|
| Overall rating | 3.6/5 | 2.3/5 |
| Value 25% | 16 $192 per GPM ($3,840, 20 GPM at 40 mJ/cm²) | 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% | 100 NSF/ANSI 55 Class A | 0 not NSF/ANSI 55 certified, and no UV dose published |
| Monitoring 20% | 100 UV intensity sensor, lamp failure alarm, shutoff valve, lamp change countdown | 30 lamp failure alarm |
| Lamp life 10% | 44 18,000 hour mercury lamp | 6 9,000 hour mercury lamp |
| Warranty 25% | 44 5-year warranty | 0 1-year warranty |
Specifications
| Viqua PRO20 | Bluonics 110W UV 24 GPM | |
|---|---|---|
| Disinfection | ||
| Rated flow | 20 GPM at 40 mJ/cm² | 24 GPM |
| NSF/ANSI 55 | Class A | No |
| Lamp | Mercury | Mercury |
| Lamp power | 140 W | 110 W |
| Lamp life | 18,000 hours | 9,000 hours |
| Monitoring | ||
| UV intensity sensor | Yes | No |
| Lamp failure alarm | Yes | Yes |
| Lamp change countdown | Yes | - |
| Shutoff valve | Yes | No |
| Build | ||
| Chamber | 316L stainless steel | 304 stainless steel |
| Ports | 1.2 in | 1 in |
| Maximum pressure | 125 psi | 125 psi |
| Voltage | 120 V | 120 V |
| Warranty | 5 years | 1 year |