- The backing up of water through a conduit or channel in the direction opposite to normal flow.
- The undesirable flow of water from a plumbing system back into the community potable water supply.
- A reverse flow condition created by a difference in water pressures that causes water to flow back into the distribution pipes of a drinking water supply from any source other than the intended one. Backflow prevention assemblies prevent contamination and are required by city and state laws.
Go to Process Safety Glossary