How sprinkler solenoid valves work - Make

On the second episode of Make: television I showed how to build an air cannon (Burrito Blaster) using PVC pipe and a sprinkler valve. The valve is

Air Cannon Sprinkle Valve Modification Build it Yourself

Orbit 5 Pack Manual Valve Converter to Automatic

Sprinklers System Valve Wiring

How to Repair a Irrigation Solenoid Valve

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How Does a Pressure Reducing Valve Work? A Step-by-Step Animation

Irrigation Valve Troubleshooting

How to Tell Whether a Sprinkler Valve Solenoid Is Bad

How does a Solenoid Valve work?

How to Troubleshoot Your Lawn Irrigation System

Most solenoid valves can be controlled manually by turning the