How many atmospheric vacuum breakers are needed per irrigation circuit?

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Prepare for the CR-21 Landscapes and Irrigation Test. Utilize flashcards and multiple-choice questions featuring hints and explanations. Get exam-ready!

Multiple Choice

How many atmospheric vacuum breakers are needed per irrigation circuit?

Explanation:
Atmospheric vacuum breakers are backflow-prevention devices that vent to the atmosphere when water pressure drops, stopping any possibility of back-siphonage into the potable water supply. Because each irrigation circuit can independently experience a pressure drop and could siphon water back if not protected, you place one AVB on each circuit. Installing more than one on a single circuit is unnecessary, and installing none would leave that circuit unprotected. So, one AVB per irrigation circuit provides the appropriate protection.

Atmospheric vacuum breakers are backflow-prevention devices that vent to the atmosphere when water pressure drops, stopping any possibility of back-siphonage into the potable water supply. Because each irrigation circuit can independently experience a pressure drop and could siphon water back if not protected, you place one AVB on each circuit. Installing more than one on a single circuit is unnecessary, and installing none would leave that circuit unprotected. So, one AVB per irrigation circuit provides the appropriate protection.

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