Phoenix price research
Under-sink reverse osmosis cost in Phoenix, AZ
Checked 2026-10-02 · Our price method
$755 to $795Typical of what 6 Phoenix-area installers advertise. The lowest advertised price we found is $499.
Some installers charge up to $999 for a bigger size or a premium valve.
These are advertised installed prices for the smallest standard size on an existing plumbing loop, not what everyone pays. Equipment, a new loop, or an in-home sales visit can add to the price. See how we check prices.
Where these prices come from
From 6 Phoenix-area installers that publish this price on their own website or in their own ads, checked October 2026. We show the range, not each company’s price, because every home and every system is different. Ask any installer for a written quote that lists the equipment and the work.
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Compare the systems and brands each Phoenix-area installer offers.