The AAV as it is also known is fitted to the boiler to automatically remove air from the central heating system and the boiler. They work using a float which opens when air is present and closes when it detects no air This ensures air can’t get into the boiler which could cause airlocks and a variety of other problems to the boiler. The auto air vent is normally located on the pump housing ensuring air is removed from the boiler at this point, the point where the water is being circulated and where air bubbles would occur. The pump circulates water around the boiler and also around the central heating system but if the air was present within the pump, the pump would cease to be effective, the boiler would overheat which would cause the boiler to turn off on an overheat fault. Auto-Air Vents are fitted to every boiler and should be checked regularly to ensure they are in good working order.

Baxi 5122330 Duo-Tec 40He Auto Air Vent

Part: 5122330

Price: £35.13
Ariston 60000994 Air Separator

Part: 60000994

Price: £17.57
Baxi 240396 Solo Pfl Auto Air Vent

Part: 240396

Price: £13.50
Heatline D003202334 Compact Auto Air Vent

Part: D003202334

Price: £33.62
Main Auto Air Vent 247391

Part: 247391

Price: £8.95
Alpha 1.027110 Intec 2, Eco 2 Auto Air Vent

Part: 1.027110

Price: £20.00
Ferroli 39801160 Optima Auto Air Vent

Part: 39801160

Price: £14.00
Ideal 173813 Mini Auto Air Vent

Part: 173813

Price: £8.95
Baxi 720777601 Automatic Air Vent

Part: 720777601

Price: £19.95
Potterton 5106932 Automatic Air Vent

Part: 5106932

Price: £13.75
Ariston 571639 Ecogenus Auto Air Vent

Part: 571639

Price: £11.04
Ariston 998643 Auto Air Vent

Part: 998643

Price: £12.00
Ideal Mexico He Auto Air Vent 174174

Part: 174174

Price: £12.51
Main Air Bleed Valve 10/18728

Part: 10/18728

Price: £7.95
Ravenheat 5015015 Air Purge Valve

Part: 5015015

Price: £11.55
Chaffoteaux 995865 Auto Air Vent

Part: 995865

Price: £10.46
Vaillant 104521 Auto Air Vent

Part: 104521

Price: £12.95
Ideal 172668 Imax Auto Air Vent

Part: 172668

Price: £9.95
Ariston 995865 Aco Auto Air Vent

Part: 995865

Price: £10.25
Ideal 113116 Classic Auto Air Vent

Part: 113116

Price: £14.50
Chaffoteaux 65104703 Auto Air Vent

Part: 65104703

Price: £21.21
Chaffoteaux 998643 Auto Air Vent

Part: 998643

Price: £12.00
Saunier Duval Auto Air Vent 2000800153

Part: 2000800153

Price: £10.25
Main Pump Airvent 720532801

Part: 720532801

Price: £19.95
Worcester Air Vent 87161402380

Part: 87161402380

Price: £17.03
Glowworm S801186 Auto Air Vent

Part: S801186

Price: £13.75
Worcester Air Vent Manual 87161405160

Part: 87161405160

Price: £10.21
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