Air Vents

Free Floating Lever Cast Iron Air/Gas Vent Model 1AV 3/4-in NPT x 1/4-in Outlet with 1/8 Orifice for 146 psi and 2.43 oz float
Armstrong Part No: C3510-2

Free Floating Lever Cast Iron Air/Gas Vent Model 1AV 1/2 inch x 1/4 out, 300 psi 5/64 orifice & 2.43 oz float
Armstrong Part No: D501533

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

Free Floating Lever Cast Iron Air/Gas Vent Model 1AV 1/2 inch, 146 psi 1/8 orifice
Armstrong Part No: C3510-1

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

Free Floating Lever Cast Iron Air/Gas Vent Model 1AV 3/4 inch, 173 psi with 7/64 inch orifice

Free Floating Lever Cast Iron Air/Gas Vent Model 1AV 3/4 inch, 300psi with 5/64 orifice
Armstrong Part No: C3510-12

Free Floating Lever Cast Iron Air/Gas Vent Model 1AV 3/4 inch, 219 psi with #38 orifice

Free Floating Lever Cast Iron Air/Gas Vent Model 1AV 1/2 inch, 173 psi with 7/64 orifice
Armstrong Part No: D501841