Backwash
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The word Backwash might refer to:
- Backwash (geography), the water that rolls back down a beach after a wave has broken
- Backwash (physical phenomenon), the backwards flow of air or water
- Backwash, the process of thoroughly cleaning a pool filter pump by reversing the flow of water through it with the dirt and rinse water going to waste. See also: Backwashing
- Backwash (album), a retrospective compilation by the group Talulah Gosh
- Backwash (saliva), the slang term for saliva that has flowed back into a drink