The most reliable air eliminators money can buy. Stainless steel float and mechanism, Viton A seal, 3/4” NPT in and out. (1/2” on special order), 1/16” air outlet orifice operates up to 208 psi. Air release rate at 150 psi is 6.04 cfm. Larger orifice sizes: 3 available on special order but operating pressures decrease. Structural pressure rating is 250 psi on all models. Repairable replacement parts are available.