NM CID MS-6 Practice Questions - New Mexico CID MS-6 Lawn Sprinklers Examination Exam

A backflow prevention assembly is required on a potable lawn-sprinkler connection primarily to:

Increase residual pressure at the last head Keep irrigation water, fertilizer, and soil contaminants from re-entering the potable supply Filter sand before it reaches the nozzles Replace the need for a zone valve

Correct Answer:

Keep irrigation water, fertilizer, and soil contaminants from re-entering the potable supply

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