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Supply Type
Manufacturer, Exporter, Supplier
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Preferred Buyer Location
All over the world
The AV21 uses a
(and not hollow) thus eliminating failure of float. Other
conventional Air Vent valves use a hollow metallic Ball
float which develops pin holes or leakages from the
welding joint and becomes heavy (due to water that
enters the float). The valve thus remains in open
position permanently