Brass Liquid Solenoid Valve - 12V - 1/2 NPS : ID 996 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Beduan Brass Electric Solenoid Valve, 1/2" 12V Air Valve Normally Colsed for Water Air Gas Fuel Oil : Industrial & Scientific
PVC Solenoid Valve, 1 inch, 120V AC
Series SVP | Proportioning Solenoid Valve is low cost and uniquely designed. Controls or regulates flow in proportion to a variable voltage input. Compatible with a wide range of gases and liquids.
Pneumatic 1-1/2" 12V/24V/110V/220V Brass Electric Solenoid Valve NC – BAOMAIN