Safe Copper Electric Solenoid Valve DN15 Pneumatic Control Two-Way Switch 1/2" | eBay
Amazon.com: Baomain Pneumatic 2 Inch 12V/24V/110V/220V Normally Open 2 Way Brass Electric Solenoid Valve for Water,Air 2W-500-50K (AC 110V) : Industrial & Scientific
Air Valve Pneumatic Valve Two-Position Three-Way One In One Out One-Way Switch | eBay
NPT 1/4'' 110V AC 5/3-Way Center pressure Solenoid Valve 2-8bar MVSC-260 | Tameson.com
What is a 4-way Solenoid Valve? - Instrumentation Tools
Understanding 5/2 and 4/2-Way Pneumatic Valves | Tameson.com