Description
The Armstrong International D41790 is an AV-13 series brass automatic air vent designed to eliminate trapped air from hydronic heating and cooling systems. With a 1/2″ Female NPT inlet and a 3/4″ Male NPT connection, this vent integrates easily into a wide range of piping configurations. Constructed from durable brass, the AV-13 is built to withstand demanding system conditions and is pressure-rated to 150 PSI, making it suitable for both residential and light commercial hydronic applications.
Automatic air vents like the AV-13 are essential for maintaining system efficiency — trapped air reduces heat transfer, causes noise, and can lead to pump cavitation. The Armstrong D41790 continuously purges air from the system without manual intervention, helping to keep hydronic circuits running at peak performance.
Key Features
- Model: AV-13 Automatic Air Vent
- SKU / Part Number: D41790
- Inlet Connection: 1/2″ Female NPT (FNPT)
- Outlet Connection: 3/4″ Male NPT (MNPT)
- Maximum Working Pressure: 150 PSI
- Body Material: Brass construction for corrosion resistance and durability
- Function: Automatic continuous air elimination from hydronic systems
Applications
- Hydronic heating and cooling systems
- Boiler and radiant heating circuits
- Residential and light commercial piping systems
- Any closed-loop system requiring automatic air purging
Why Choose Armstrong International?
Armstrong International is a trusted name in steam, air, and hot water system solutions. The AV-13 series air vents are engineered for reliable, long-term performance with minimal maintenance, making them a go-to choice for HVAC professionals and plumbing contractors alike.
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