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Manual Air Vent Perfexim A417/A4206 1/2" with Knob, model 20-401-0150-001
Manual Air Vent Perfexim A417/A4206 1/2" with Knob, model 20-401-0150-001 is a hand-operated air release valve designed for controlled bleeding of heating and plumbing systems. Compatible with Perfexim A417 and A4206 series, this 1/2" nominal connection valve uses a rotary knob to open and close the discharge, allowing trapped air to be removed from radiators, boilers and pipework to restore system circulation and reduce noise caused by air pockets.
The valve provides precise manual control over air release through its rotary knob, enabling gradual or quick venting as needed. Its 1/2" nominal connection ensures compatibility with common radiator and pipe fittings. The compact design allows installation in confined spaces and on various system components. Built for straightforward operation and maintenance, the valve helps preserve pump efficiency and reduces risk of air-related interruptions in heating systems.
Install the manual air vent into the designated radiator or pipe fitting with appropriate sealing methods, ensuring system pressure is relieved according to the system manufacturer’s instructions before operation. To bleed the system, turn the rotary knob slowly to open the valve until air is expelled; when water begins to appear continuously, close the knob to stop discharge. Periodically check the valve for proper seating and any drip leaks and operate the knob as part of routine system maintenance to prevent air accumulation.
Use the valve only on compatible radiator or pipe fittings with the specified nominal size. When servicing or installing, follow the heating system safety procedures: depressurize if necessary, wear appropriate protective equipment, and verify tightness after operation. For persistent air ingress or repeated bleeding requirements, inspect the system for leaks, circulation faults or incorrect filling procedures and consult a qualified technician.
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