Right now there are 31 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Industrial & Scientific › Filtration › Industrial Process Filtration. 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: Hydronix, Pentek, 3M, DeVilbiss, Manitowoc, OMNIFilter, Oxford, Purolator. Every item is a one-off, so the stock moves all day and new deals keep arriving.