Matches in DBpedia 2016-04 for { ?s ?p "A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow.In water supply systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture. Water pressure may fail or be reduced when a water main bursts, pipes freeze, or there is unexpectedly high demand on the water system (for example, when several fire hydrants are opened)."@en }
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- Backflow_prevention_device comment "A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow.In water supply systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture. Water pressure may fail or be reduced when a water main bursts, pipes freeze, or there is unexpectedly high demand on the water system (for example, when several fire hydrants are opened).".
- Q200670 comment "A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow.In water supply systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture. Water pressure may fail or be reduced when a water main bursts, pipes freeze, or there is unexpectedly high demand on the water system (for example, when several fire hydrants are opened).".