DISCALAIR High discharge, high performance, automatic air vent

Our “Top Shelf” Auto Air Vent: The 551 Series DISCALAIR®


Caleffi’s DISCALAIR® is a high discharge, high performance, automatic air vent.  Our best automatic vent, it has a unique and rugged pin-guided float for reliability in not-so-perfect vertical installations.  The DISCALAIR is 100% serviceable; the internal float/vent assembly can be replaced if it should ever become damaged. Vent cap choices offer additional flexibility.  High venting capacity of 1.8 SCFM at 20 PSI and 3 SCFM at 50 PSI, with 1/2" FNPT connection make the DISCALAIR just right for medium-to-large installations. Also, the auto air vent is perfect for use with Caleffi ThermoCon™ storage tanks. Try one on your next hydronic project; you'll love it!

CALEFFI – Creating innovative, superior performance products that help customers live comfortably and economically, while softening their impact on the environment.