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Thanks for reply. I will check it out.
Find a professional install near you, with the same conditions of landscaping and slopes, if any, and see what they used. For small lawns on flat properties, it would be most common to see antisyphon zone valves, with their built-in vacuum breaker backflow preventers.
What is required for San Diego? Residential sprinklers
Does anyone know what the code is for San Diego residential sprinklers? I'm not sure what backflow device to use. Thanks.