Orbit 1/2 in. Pattern Brass Pop-Up Head with Brass Nozzle 54071 - The Home Depot

What made California ban plastic simple sprinkler heads like Orbits but not similar Orbit pop-ups or brass heads?

Orbit Brass 90 Degree Quarter Spray Pattern Pop-Up Yard Sprinkler Head - 54072 (5, 1 Count (Pack of 5)) - Yahoo Shopping

ORBIT UNDERGROUND SPRINKLER SYSTEM – Toolbox Supply

Rain Bird Lawn Sprinklers in Watering & Irrigation

Orbit Brass 90 Degree Quarter Spray Pattern Pop-Up Yard Sprinkler Head - 54072 (5, 1 Count (Pack of 5)) - Yahoo Shopping

Orbit Brass 90 Degree Quarter Spray Pattern Pop-Up Yard Sprinkler Head - 54072 (5, 1 Count (Pack of 5)) - Yahoo Shopping

Orbit 1/2 Pattern Plastic Flush with Brass Nozzle 54025 - The Home Depot

Orbit Saturn III Plastic Pop-Up Gear-Drive Sprinkler Head 55069 - The Home Depot

Orbit 54028 Plastic Pop-up Sprinkler Head with Brass Nozzle 1/2 Radius : Automatic Lawn Sprinkler Heads : Patio, Lawn & Garden