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.
|Connection Type:||FNPT to MNPT|
|Size:||1/2" x 3/4"|