Tap & Terrain — cartridge-cost reference
Checked September 10, 2026; next review October 2026. USD.

Aquasana AQ-MF-1 | AQ-MF-1-R | $91.99 | 6-month budget interval | five-year replacement reserve $919.90
Published MSRP; not a checkout quote
Source: https://www.aquasana.com/april2026-replacement-filter-price-changes.html

Aquasana AQ-MF-1 — WFL | AQ-MF-1-R | $78.19 | 6-month budget interval | five-year replacement reserve $781.90
Published Water for Life price; program conditions apply
Source: https://www.aquasana.com/april2026-replacement-filter-price-changes.html

Waterdrop WD-10UA | WD-RF10 | $30.99 | 12-month budget interval | five-year replacement reserve $154.95
Listed one-time RF10 purchase price; verify selected variant
Source: https://www.waterdropfilter.com/products/wd-rf10-15-17

Reserve includes replacements due at month 60. Initial cartridge assumed included with system. Excludes equipment, installation, shipping, tax, unexpected service and price changes. Follow earlier capacity or condition triggers; this is not a maintenance prescription or a performance comparison.
Methodology and service-interval sources: https://tapandterrain.com/resources/filter-replacement-costs