Anything mechanical has wear items. However, the dynamic shaft seal that is known to fail on a lot of “T” style carbureted pumps is not used on an inline, wet motor design like ours. Additionally, we use a brushless motor, so there are no brushes to wear out. As long as the system is plumbed correctly and you keep up with filter changes (especially the pre-filters), you should expect a very long life. If there ever is a failure, we can repair the pumps. Repairs are generally very cheap- we just try to break even on something like that.