water back :
- n water heater consisting of a tank or pipes set at the back of a fireplace or in the firebox of a stove
News & Articles
- Stunning Photos Of Google's Massive Data Centers
These pipes carry water in and out of Google's The Dalles, Ore., data center. The blue pipes supply cold water and the red pipes return the warm water back to be cooled.
June 16, 2013 - Forbes