Brass exhaust valve,automatic air vent
Code: V21-017
Automatic air vent with vertical discharge, a plastic shut off cap
Size: 3/8", 1/2"
Body in brass finish.
1.) 3/8" or 1/2" BSP male thread.
2.) Â It automatically removes trapped air from a central heating installation. It has a shut off cap that can be used to stop auto venting if so required.
3.) The valve in the picture shows a plastic shut off cap, sometimes they have a brass cap Art.V21-805 (makes no difference to operation of the valve).
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