Air Vents

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 3/4 NPT 92 psi, 3/32-in Orifice
Armstrong Part No: D500036

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 3/4 inch, 208 psi, 1/16 orifice
Armstrong Part No: D501713

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 1/2 inch, 208 psi, 1/16-in Orifice, 2.25 Flt Wt
Armstrong part no. D501212

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model Model 21-AR 1/2 inch npt, 23 psi, 3/16 inch orifice

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 1/2-in NPT, 92 psi, 3/32-in orifice
Armstrong order no D500248

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 3/4 inch, 133 psi, 5/64 Orifice Vent
Armstrong Part No: D500631

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 3/4 inch NPT, 1/16 orifice, 250 Psi, 4.12 oz Float Weight

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 3/4 inch npt, 5/32 Orifice, 33 PSI

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 3/4 inch, 9/64 inch orifice, 41 psi
Armstrong Part No: D515553

Cast Iron Fixed Pivot Ball Float Air/Gas Vent Model 21AR 3/4 inch NPT 1/8 inch Orifice 52 Psi
Armstrong Part No: D505649