iSpring UVF55FS
#9 in Up to 12 GPMFull review
A popular budget point of entry UV for a well that already has sediment filtration. Fine as a backstop, but nothing tells you the dose is being met.
Amazon $299.90$299.90
The iSpring UVF55FS rates 2.2 among up to 12 GPM UV water purifiers; the iSpring UVF50 LED rates 2.2 among over 12 GPM ones. The iSpring UVF55FS costs $200.09 less ($299.90 vs $499.99).
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
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
These two sit in different flow classes (up to 12 GPM and over 12 GPM), and each is scored against the reference points for its own class, so a rating says how well each does among its own flow peers. How we rank explains each factor.
| Factor weight | iSpring UVF55FS | iSpring UVF50 LED |
|---|---|---|
| Overall rating | 2.2/5 | 2.2/5 |
| Value 25% | 58 $62.48 per GPM ($299.90, 4.8 GPM at 40 mJ/cm², from 12 GPM at an unstated dose taken as 16) | 43 $94.34 per GPM ($499.99, 5.3 GPM at 40 mJ/cm², from 13.2 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% | 30 lamp failure alarm | 50 monitoring not published (neutral score used) |
| Lamp life 10% | 6 9,000 hour mercury lamp | 0 8,000 hour LED lamp |
| Warranty 25% | 0 1-year warranty | 0 1-year warranty |
Specifications
| iSpring UVF55FS | iSpring UVF50 LED | |
|---|---|---|
| Disinfection | ||
| Rated flow | 12 GPM | 13.2 GPM |
| NSF/ANSI 55 | No | No |
| Lamp | Mercury | LED |
| Lamp power | 55 W | - |
| Lamp life | 9,000 hours | 8,000 hours |
| Monitoring | ||
| UV intensity sensor | No | - |
| Lamp failure alarm | Yes | - |
| Shutoff valve | No | - |
| Build | ||
| Chamber | 304 stainless steel | - |
| Ports | 1 in | 1 in |
| Maximum pressure | 85 psi | - |
| Voltage | 120 V | - |
| Warranty | 1 year | 1 year |