Aha Trivia: Stuff Everyone Should Know · ahatrivia.com/mb-plumbing-6e37c0913d4b
What is a backflow preventer used for?
- Heating water quickly
- Filtering out minerals
- Stopping water from flowing backward
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References
- Plumbing en.wikipedia.org/wiki/Plumbing Checked 2026-11-07.
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