I've purchased several of these little pumps over the years for my parents, who have a huge number of hummingbirds at their house (they have several feeders). They put these in birdbaths and their ponds to help the little cuties take a bath and keep cool in the summer. They live in the country and have hard water so the pumps usually don't last more than a couple years so it's important to find something reasonably priced. I can't speak to the longevity but it works great and the hummingbirds love it! The price is right so I won't mind replacing in a couple years if needed.