Name: Taco Automatic Air Vents
Brand: Taco Comfort Solutions

Model 400 Hy-Vent: ⅛" NPT; maximum system pressure 150 psi; maximum venting pressure 50 psi.
Model 416 Slim-Line Hy-Vent: ⅛" NPT; maximum system pressure 150 psi; maximum venting pressure 115 psi.
Model 426 Hy-Vent: ¼" NPT; maximum system pressure 150 psi; maximum venting pressure 50 psi.
Model 418 Hy-Vent: ½" × ¾" NPT; maximum system pressure 150 psi; maximum venting pressure 50 psi.
Model 419 High-Pressure Hy-Vent: ½" × ¾" NPT; maximum system pressure 250 psi; maximum venting pressure 150 psi.
Model 409 Commercial Vent: ¾" NPT; maximum system and venting pressure 150 psi.
Model 417 Coin Vent: ⅛" NPT; maximum system and venting pressure 125 psi.

Nickel-plated brass Hy-Vent bodies with removable caps.
Bubble breakers included on models 400, 416 and 426.
Heavy-duty conical brass 409 body; discharge connection accepts ¾" ID flexible tubing.
Model 417: cellulose discs, with an internal ball check that permits manual closure.

Model 414 waste connector for models 400, 416, 426 and 418, with ¼" NPT thread to a waste line.
Model 415 service check valve for models 400 and 416 allows the vent to be replaced without draining the system.

Taco Automatic Air Vents

Hy-Vent, 409 and 417 Coin Vent — up to 250 psi system pressure, 240°F (116°C), ⅛" to ¾" NPT