Right now there are 22 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Tools & Home Improvement › Plumbing › Water Pumps, Parts & Accessories › Pump Replacement Parts. 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: Quicksilver, Aquascape, Fill-Rite, Jabsco, Johnson, Milwaukee, Rule, Wayne. Every item is a one-off, so the stock moves all day and new deals keep arriving.