Wolo® 812-EV - 1/4" O.D. Electric Solenoid Air Valve

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Product Details

Universal 1/4" O.D. Electric Solenoid Air Valve by Wolo®. The Model 812-EV is the electric solenoid valve designed to be used with Wolo’s Challenger Model 810. When the vehicle's horn button is depressed, the Model 812-EV becomes electrically energized, opening the valve, permitting air to enter the horn from the tank. The solenoid remains engaged as long as the horn button is depressed. The valve easily threads into the tank and is connect to the air horn by using a 1/4" O.D. high pressure air hose (not included). The valve comes with brass fitting.


Voltage: 12 V
Current: 2.7A @ 12 VDC
Hose fittings: 1/4" Brass
Size: L 4-1/4" x W 1-3/8" x H 2-1/8"


  • Will produce a super loud alerting sound to keep you safe on the road
  • Looks as good as sounds and sports a compact, elegant, and stylish design
  • Can be installed and assembled with no great effort, enables a secure connection
  • Manufactured with state-of-the-art materials and leading-edge innovations

Wolo® is a second–generation family owned business providing cutting-edge products which deliver the ultimate in quality and value to protect and keep people safe. In 1965 Wolo was established by one person who had an idea and commitment to manufacture a single patented hood lock. Today Wolo is a leading company in horn design and technology which also creates a variety of vehicle emergency and safety warning lights, sirens and speakers, on-board systems, and many other top-notch products.

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Vehicle Fitment

This part is universal


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Wolo® 812-EV - 1/4" O.D. Electric Solenoid Air Valve

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