Best for pull-down and specialty faucets

Aquasana Countertop Filter

Reviewed June 13, 2026

When your faucet won't take a clip-on filter — pull-down sprayers, touchless, or unusual shapes — a countertop diverter filter is the renter-friendly answer that needs no drilling. The Aquasana countertop unit connects to the faucet through a diverter valve and routes water through a multi-stage cartridge certified to NSF/ANSI standards for a broad contaminant list including chlorine, lead, and others, then out through its own small spout. Filter life is far longer than a clip-on, and it's fully removable when you move. The cost is literal counter space and a second spout — the trade most pull-down-faucet households happily make versus committing to under-sink plumbing.

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What we like

• ✓Works with pull-down and specialty faucets a clip-on can't fit
• ✓Multi-stage cartridge certified for a broad contaminant list
• ✓No drilling — renter-friendly and removable
• ✓Much longer filter life than clip-on faucet filters
• ✓Dedicated filtered-water spout