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.