1. The installation of yard hydrants where water is available or accessible for drinking or culinary purposes and which have drip openings below ground surface, is prohibited unless such hydrants are equipped with an approved device to prevent entrance of ground water into chambers connected with the water supply.
2. Yard hydrants or hose bibs which would be used by the consumer to provide water to mix pesticides, fertilizer, or other chemicals, for direct use or aerial application to surface areas shall be equipped with an antisiphon vacuum breaker.
3. All underground lawn and garden sprinkler systems shall be equipped with an approved backflow prevention device.