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are vertical spirovents directional?

ryan242 Member Posts: 25
Does anyone know if the vertical spirovents are directional in flow? I am looking at the combination air seperator/dirt seperator and it shows an arrow pointing where the water would flow


  • STEVEusaPA
    STEVEusaPA Member Posts: 6,506
    Vertical, point up with direction of flow. Considering they should be installed where water is the hottest, coming out the top of the boiler going up.