418-4 1/2" FNPT x 3/4" MNPT Taco Hy-Vent 418 Air Vent

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The 418-4 from Taco is a 1/2” FNPT x 3/4” MNPT Hy-Vent Air Vent. This item is simple, easy to install and is compatible with any heating system. The vents are serviceable by unscrewing the vent cap.

Technical Specifications:

Inlet connection: 1/2" FNPT (inside) x 3/4" MNPT (outside) - the inlet is threaded from both outside and inside;
Max Venting Pressure: 50 psi;
Max Operating Pressure: 150 psi;
Max Operating Temperature: 240°F;