PUR PLUS Faucet Mount System, Vertical (FM-3700B) review
By Daryna Klochko · Published · Specs checked Oct 14, 2026 · 
Scores 9.25/10, tied for 3rd of the 6 faucet filters we track. No price is published, so it gets the minimum 1.5 of 2 on price. Its 2-year warranty is longer than the 1-year category median. On Amazon, 447 of the 542 reviews that mention leakage are negative.
Reliability comes first: 447 of 542 Amazon reviews about leakage are negative
- Price
- Price not checked
- Certified for
- Lead · VOCs · PFAS +4
- Flow
- 0.52 gpm
- Cartridge life
- 100 gal
- Cost per year
- $52
- Warranty
- 2 years (limited)
Certification
Listed by IAPMO and NSF under NSF/ANSI 42 · 53 · 401 for Chlorine, Lead, VOCs, Total PFAS, Microplastics, checked Oct 14, 2026. Search the IAPMO listings
- Chlorine
- Lead
- VOCs
- Total PFAS
- Microplastics
The contaminants or other substances removed or reduced by this water treatment device are not necessarily in your water. Listing checked on Oct 14, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 14, 2026 · source under each valueFiltration
Cartridges and install
Warranty, returns and shipping
Warranty: 2 years (limited). Returns: Set by the retailer. Shipping: not stated by the brand. Source: pur.com, checked Oct 14, 2026.
Source: pur.com, checked Oct 14, 2026.
Compared with similar faucet filters
All 6 faucet filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Culligan Faucet Mount Filter CULFMWH | $27.49 | PFAS · Microplastics +1 | $40 | 2 years (limited) | 9.5/10 | Check price → |
| Brita Elite Advanced Faucet System | $32.49 | Lead · VOCs +3 | $54 | 1 year (limited) | 9.5/10 | Check price → |
| Brita Elite Faucet System | $32.49 | Lead · VOCs +3 | $54 | 1 year (limited) | 9.25/10 | Check price → |
| iSpring DF2-CHR Faucet Water Filter | $35.99 | Brand claims only | $30 | 1 year | 9/10 | Check price → |
| PUR PLUS Faucet Mount System, Vertical (FM-3700B)THIS MODEL | Price not checked | Lead · VOCs +5 | $52 | 2 years (limited) | 9.25/10 |
What owners say
Checked Oct 14, 2026447 of 542 Amazon reviews about leakage are negative. In our score this is 1.5 of 2 points. How we score
- Installation715 mentions693 positive22 negative
- Water taste616 mentions555 positive61 negative
- Leakage542 mentions95 positive447 negative
- Durability529 mentions117 positive412 negative
- Stability222 mentions96 positive126 negative
Store ratings change over time; the date shows when we checked.
