Definitions

1. noun

a flow of fluid in the opposite direction to its intended path, often due to a pressure difference.

“The plumber had to fix the backflow in the kitchen sink that was causing water to spill onto the floor.”

2. verb

to flow or move in the opposite direction to its intended path, often due to a pressure difference.

“The water backflowed into the tank after the pump was turned off.”

3. noun

a device or system designed to prevent backflow of a fluid, especially in a sanitary drainage system.

“The building codes required the installation of a backflow preventer in the plumbing system to prevent contamination of the water supply.”