Reverse osmosis systems: brands compared on published prices

Brands with evidenced Reverse osmosis systems products

A brand appears here when its own live product or collection page for Reverse osmosis systems answered at the linked URL on the date shown. Prices in the table are each brand's advertised prices for its named systems; shipping, installation and local water conditions change the delivered cost.

Choosing an RO system

Under-sink RO is the default buy here: it treats the water you actually drink and cook with, at a fraction of whole-home cost, with tank and tankless designs both represented in the table. Check the stage count and what each stage does on the linked pages; more stages is marketing until the page says what the stage removes.

Two running realities decide satisfaction: RO sends reject water to the drain, at ratios the brands print, and membranes plus pre-filters are consumables on a schedule. Both numbers live on the same product pages as the prices, and both belong in the comparison.

Common questions

What does a reverse osmosis system remove?

Dissolved solids broadly, which is what distinguishes membranes from carbon: the linked product pages carry each system's specific reduction claims and certifications, and those pages, not the category name, are what to verify against your test results.

What does a home RO system cost?

Under-sink units from the priced brands below are advertised at the verified figures shown; whole-house RO is often engineered per home and quoted rather than listed, and where a brand publishes no price this index records that fact.