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What Filter Removes

A. O. Smith RO with Microbial Boost AO-US-RO-MB-4000 vs APEC ROES-PH75

Only the A. O. Smith RO with Microbial Boost AO-US-RO-MB-4000 is certified to reduce PFAS, lead, chlorine and chloramine and 7 more. Verdict: the A. O. Smith RO with Microbial Boost AO-US-RO-MB-4000 for broader certified protection (12 vs 1 of the contaminants we track).

A. O. Smith RO with Microbial Boost AO-US-RO-MB-4000APEC ROES-PH75
TypeUnder-sink reverse osmosisUnder-sink reverse osmosis
Price—$269
Filters + water a year (2 people)$270—
Filter cost per gallon (rated life)37¢—
Gallons per day11.6475
Pure to drain—0.66:1
Installationdiydiy
PFASCertified—
LeadCertified—
ChlorineCertified—
ChloramineCertified—
FluorideCertified—
ArsenicCertified—
Chromium 6Certified—
MercuryCertified—
CystsCertified—
VOCsCertified—
TDSCertifiedCertified
CopperCertified—
Check price at A. O. Smith: RO with Microbial Boost AO-US-RO-MB-4000 →Check price on Amazon: ROES-PH75 →