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Altecnic air vents designed for heating systems. Available in four variants: 4 bar 3/8" connection, 6 bar 1/2" connection, 6 bar 15mm connection, and 1/2" hygroscopic air vent. Suitable for automatic or manual bleeding of air from pipework. Essential maintenance component for efficient boiler and radiator operation. Hygroscopic variant seals automatically when system is pressurised.
