Hy-Vents purge unwanted air from hydronic systems, keeping them running efficiently and quietly. When air is trapped in pipes and valves, it leads to disruptive noise levels and lost heat energy. The 400-4 uses a float type venting action that detects and expels air automatically. Adding Taco Hy-Vents to your hydronic system is a straightforward, smart way to keep everything running reliably and effectively.
Simple Servicing
Hy-Vent automatic air vents feature an easy-to-remove vent cap that allows for quick spot checks and uncomplicated maintenance. Alternatively, this vent cap may be sealed for safe system servicing.
Bubble Breaker
The 400-4 has a small, bubble-breaking fin at the base of the unit. This fin extends into your pipe where it disrupts large air bubbles, making them easier to vent.
Product Compatible With
Taco 431-6 Air Scoop
Taco 432-6 Air Scoop
Taco 433-5 Air Scoop
Taco 434-5 Air Scoop
Taco 435-5 Air Scoop
Taco 436-5 Air Scoop
Taco 437-1 Air Scoop
California residents see
Warning: This product can expose you to chemicals including Lead which is known to the State of California to cause Developmental Harm.
Warranty WarrantyA warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
1 Year
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