Caleffi 501502A

Caleffi 501502A is an extra hi capacity air vent with a 3/4" NPT connection, designed for NA548 & NA549 Series hydronic systems. This high-capacity vent efficiently releases trapped air, helping prevent air locks and maintain steady system pressure and performance.

Perfect for larger heating zones and high-flow circuits, the Caleffi 501502A helps prevent air pockets that can reduce efficiency. Its rugged construction and compatibility with NA548 & NA549 components ensure dependable venting through seasonal swings in temperature and pressure. Designed for reliability, the vent's robust materials resist typical heating system wear, delivering consistent performance across seasons.

• 3/4" NPT connection for straightforward installation
• Extra-high capacity venting designed for large systems
• Reduces air pockets to maintain steady flow and heat transfer
• Compatible with NA548 & NA549 Series components
• Durable, corrosion-resistant body for long service life

Perfect for retrofit projects or new installations, this vent integrates seamlessly with existing NA548 & NA549 lines, helping keep systems primed and efficient.