3M Aqua-Pure AP903 Whole House Sanitary Quick Change Filter review
Whole-house carbon filter. Plumber recommended if you are not comfortable with this install. Skill and code, not a preference. Listed to NSF/ANSI 42.
What it removes
| Contaminant | Evidence | Stated reduction | Scope |
|---|---|---|---|
| Chlorine (residual) | Certified | not stated | taste odor |
| Turbidity | Certified | not stated |
Certified is an NSF, WQA, or IAPMO listing for that claim.
Chlorine taste at every tap. Does not soften.
Certifications
- NSF/ANSI 42: Chlorine Reduction (listing checked 2026-09-14)
- NSF/ANSI 42: Taste and Odor Reduction (listing checked 2026-09-14)
- NSF/ANSI 42: Nominal Particulate Reduction, Class III (listing checked 2026-09-14)
Commonly installed ahead of a softener as sediment/chlorine protection; does not soften.
Single sanitary quick-change AP917HD cartridge (5 micron nominal, carbon), 1 in FNPT. NSF listing rates 10 GPM service flow; manufacturer literature cites 20 GPM peak. 100,000 gal, 9-12 month change. Replacement AP917HD $294.09 on Amazon listing B00KY9JMEC (search snippets show other sellers near $149) -> annual est. $294. NSF/ANSI 42 verified: Chlorine Reduction, Taste and Odor Reduction, Nominal Particulate Reduction Class III. Aqua-Pure retail page lists $384.21 vs $990.64 list.