Right now there are 350 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Home & Kitchen › Kitchen & Dining › Water Coolers & Filters › Replacement Water Filters. These are inspected returns and open-box items that Amazon sells and ships itself. WarehouseHunter puts each one next to its current new price, so you can see what you save at a glance.

Brands with the most offers here: Pentek, Waterdrop, Brio, Crest, Frizzlife, ICEPURE, Culligan, Membrane Solutions. Every item is a one-off, so the stock moves all day and new deals keep arriving.