NM CID MM-1 Practice Questions - New Mexico CID MM-1 Plumbing Examination Exam

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A potable-water irrigation system has underground heads that can be submerged and a downstream zone valve. Which backflow method is appropriate?

An AVB installed 6 inches above grade but downstream of the zone shutoff No backflow device if the controller is 24 volts A pressure vacuum breaker or reduced-pressure assembly installed above the highest downstream piping, not an AVB downstream of the zone valve A dual check at each sprinkler head

Correct Answer:

A pressure vacuum breaker or reduced-pressure assembly installed above the highest downstream piping, not an AVB downstream of the zone valve

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