Caleffi VALCAL® Automatic Air Vent, Series: 5022, 1/2 in Nominal, MNPT, 150 psi Max Working, 250 deg F, Brass, 2-3/16 in L x 4 in H
High capacity float type automatic air vent designed for use on manifolds or pipes in sealed heating systems. Check valve on 5023 series allows an easy replacement of air vent without purging the system.