TACO 3/4 Inch Commercial Brass Air Vent Heavy Duty - 409-3
The TACO 409-3 Air Vent, designed with a robust brass construction, offers unparalleled reliability for hydronic systems operating up to 150 psi. Featuring a 3/4 inch NPT female connection, this device is engineered to enhance system efficiency by facilitating the automatic removal of air.
This air vent is an essential component for large scale HVAC systems, ensuring a reduction in air-bound radiators and enhancing the overall system filling process. Its design optimizes clearance, preventing fouling from debris in the system..
Features
- Equipped with a unique conical design to maximize operational clearance.
- Hygroscopic cellulose discs in the valve for optimum air purging.
- Manual shut-off feature integrated for streamlined control
Specifications
| Connection Type: |
3/4 inch NPT female |
| Operational Pressure: |
Up to 150 psi |
| Material: |
Brass |
What Our Experts Think
-
The Taco 409-3 Commercial Brass Air Vent is a heavy-duty 3/4" automatic air vent designed to efficiently remove trapped air from hydronic heating and cooling systems.
-
Its brass construction ensures superior durability and corrosion resistance in high-pressure, high-temperature environments.
-
Built for commercial and industrial applications, it helps maintain system efficiency, prevent noise, and reduce wear on pumps and valves.
-
Compact, reliable, and maintenance-free, it’s an ideal choice for professional-grade HVAC installations.
Q&A
Q: What is the connection size of this air vent?
A: It features a 3/4-inch NPT connection for easy installation into hydronic systems.
Q: What systems is it suitable for?
A: Designed for use in commercial and heavy-duty hydronic heating and cooling systems.
Q: What material is it made from?
A: It’s made entirely of brass for corrosion resistance and long-term reliability.
Q: Does it require regular maintenance?
A: No — it’s a self-venting, automatic design that operates without manual intervention.
Q: What problem does it solve?
A: It removes trapped air pockets to improve circulation, system performance, and equipment longevity.
Maintenance Tips
-
Inspect periodically for leaks or mineral buildup at the vent opening.
-
Ensure the vent remains upright for proper air release function.
-
Do not overtighten when installing to prevent thread damage.
-
If system water quality is poor, flush the system occasionally to avoid clogging.
-
Replace if leakage or reduced venting efficiency is observed over time.
