backflow in a sentence

Examples

1. The proximal region contains valves which prevent the backflow of sperm when muscles dilate.
2. This drift tube prevents backflow of electromagnetic radiation.
3. In the United States, the minimum backflow protection is usually determined by state regulation.
4. Many water suppliers require this, and plumbing code may legally require permanently installed backflow preventers.
5. These deep veins are enclosed inside contracting muscles, and contain valves that prevent backflow ).
6. Backflow preventers are categorized into three groupings, an Assembly, a Device or a Method.
7. Backflow preventers and nonbypass pressure regulators are valves that prevent contamination of a municipal water supply system.
8. Therefore, it is very important to understand the proper level of backflow prevention required by law.
9. :You could start with plumbing here; it's possibly a " backflow preventer ".
10. This prevents backflow of air, keeps out some rain, and provides a bit more privacy.