Home / Home / Drain the pump and filter lines. That's the real trick.Home Swimming PoolsDrain the pump and filter lines. That's the real trick.Yes, it’s mostly about protecting the pump and plumbing from freezing. Search AmazonAs an Amazon Associate, Work Notes may earn.Related NotesExploreExploreExplorePrevious Drain the water below the cover, but not too low.Next Drain the cover first, then zip the ties.