Taco 400-4 Air Vent

Taco 400-4 Air Vent is an automatic, float-type air vent designed for high-capacity air removal in piping systems. This brass-bodied vent delivers reliable automatic venting, helping you maintain efficient flow and prevent corrosion from trapped air.

With a 1/8 inch threaded inlet and a rugged brass body, it withstands demanding conditions. The unit offers a temperature rating up to 240°F and a venting pressure of 150 PSI (50 PSI while venting). A built-in bubble breaker enhances venting efficiency by breaking up air pockets for smoother purging. This air purging device is ideal for heating, cooling, and hydronic systems.

• Automatic float-type operation for continuous venting
• Durable brass body for longevity in harsh environments
• Inlet size 1/8 inch with threaded connections for secure installation
• Temperature rating up to 240°F and pressure rating 150 PSI (50 PSI venting)
• Bubble breaker to improve venting efficiency
• Ideal air purging device for HVAC, heating, cooling, and piping systems