Stiebel Eltron Asia Fountain 7S
A NSF-certified faucet-mount filter that is certified to reduce 4 contaminants.
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You want on-demand filtered water at an existing faucet, cheaply and with no plumbing.
Certified to reduce 4 contaminants.
Like most carbon filters, it does not remove fluoride — only reverse osmosis does that.
What is faucet-mount filter? A small unit that screws directly onto your existing faucet, with a switch for filtered or unfiltered water. Compare all filter types →
What it costs to own
| Upfront price | Check on Amazon → |
| Replacement filter (AP-1721) | Find replacement → |
| Estimated yearly cost (filters, ~4×/yr) | — |
| True cost per gallon | — |
Cost per gallon and yearly cost are our estimates from the rated capacity and current prices. The filter only works if you replace it on schedule.
What it's certified to remove
Certification is per-contaminant: the Stiebel Eltron Asia Fountain 7S is credited only for the contaminants listed here, verified by NSF. It does not imply removal of anything not listed.
✓ Verify this certification on the official NSF listing →
Full specifications
| Certified by | NSF |
| NSF/ANSI standards | 42 — reduces taste, odor, and chlorine (aesthetic standard) · 53 — certified for health contaminants such as lead, VOCs, and cysts |
| Filter type | Faucet-mount filter |
| Rated capacity | 1,141 gallons |
| Flow rate | .5 gpm |
| Replacement element | AP-1721 |
| Installation | Screws onto the faucet. No tools. |
Frequently asked
Is the Stiebel Eltron Asia Fountain 7S NSF certified?
Yes — the Stiebel Eltron Asia Fountain 7S is listed in the NSF certified-product database under NSF/ANSI standards 42, 53. That means an independent body verified its claims (not just "tested to" a standard).
What does the Stiebel Eltron Asia Fountain 7S remove?
It is certified to reduce 4 contaminants: Chlorine / chloramine, Total Trihalomethanes, Turbidity, Volatile organics.
How often do you replace the faucet-mount filter?
A faucet-mount filter like this is typically replaced about 4 times a year (replacement element AP-1721). Replace on schedule — a spent cartridge stops reducing contaminants.
Compare similar faucet-mount filters
Source: NSF public certification listing. Specs and certified claims are from the official listing; cost figures are our estimates. Some links are affiliate links — see our disclosure.