Waterdrop TSU 0.01 Micron Ultrafiltration Under-Sink System review
Under-sink carbon filter. DIY if you are comfortable with this install. No third-party certification on record. Claims below are manufacturer-reported.
What it removes
| Contaminant | Evidence | Stated reduction | Scope |
|---|---|---|---|
| PFOA | Manufacturer-reported | 99% | |
| PFOS | Manufacturer-reported | 99% | |
| Chlorine (residual) | Manufacturer-reported | 99% | |
| Lead | Manufacturer-reported | not stated |
Certified is an NSF, WQA, or IAPMO listing for that claim.
Kitchen cold line. Does not soften the house.
3-stage PP sediment (6 mo, $30.99) + carbon block (12 mo, $36.99) + 0.01 micron UF membrane (24 mo, $42.99, 2,200 gal); annual cost est. from those three. Dedicated faucet requires a countertop hole; municipal water only per Waterdrop. Not RO: does NOT lower TDS and does NOT address arsenic, uranium, nitrate or fluoride. Only NSF/ANSI 372 (lead-free materials) is listed on Waterdrop's own NSF page; no NSF 42/53/401 performance certification found for the TSU (nsf.py 'TSU' and 'Waterdrop' 042/053/401 returned no TSU listing). PFOA/PFOS/chlorine 99% and lead claims are Waterdrop's own data. Amazon price $139.99 (Waterdrop MSRP $189.99, on sale $149.99).