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.

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Potterton Envoy, Suprima Auto Air Vent 430054

Part: 430054

Price: £8.95
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Baxi 248043 Duo-Tec, Platinum, Megaflow Auto Air Vent

Part: 248043

Price: £9.95
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Worcester Bosch 87185050140 Greenstar He Plus Auto Air Vent

Part: 87185050140

Price: £30.99
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Chaffoteaux 998643 Auto Air Vent

Part: 998643

Price: £12.00
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Potterton Pump Airvent 720532801

Part: 720532801

Price: £19.95
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Worcester Bosch 87161064450 Greenstar Auto Air Vent

Part: 87161064450

Price: £11.95
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Baxi 720777601 Automatic Air Vent

Part: 720777601

Price: £19.95
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Saunier Duval Auto Air Vent 2000800153

Part: 2000800153

Price: £10.25
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Vaillant 061707 Turbomax Auto Air Vent

Part: 061707

Price: £13.00
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Chaffoteaux 60000994 Air Separator

Part: 60000994

Price: £17.57
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Heatline D003202334 Compact Auto Air Vent

Part: D003202334

Price: £33.62
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Chaffoteaux 995865 Auto Air Vent

Part: 995865

Price: £10.46
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Ferroli 39818220 Optimax He Domicompact Auto Air Vent

Part: 39818220

Price: £44.00
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Potterton Auto Air Vent 240396

Part: 240396

Price: £13.50
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Potterton Lynx 2 Automatic Air Vent 430000

Part: 430000

Price: £9.95
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Baxi 247391 Maxflow Combi Wm Auto Air Vent

Part: 247391

Price: £8.95
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Ideal 170988 Evo, Icos, Isar, Istor Auto Air Vent

Part: 170988

Price: £25.99
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Saunier Duval Auto Air Vent 2000801898

Part: 2000801898

Price: £14.95
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Ideal 176457 Procombi Exclusive Auto Air Vent

Part: 176457

Price: £19.95
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Alpha 1.010771 240, Cb, Cd Auto Air Vent

Part: 1.010771

Price: £14.00
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Ideal 172668 Imax Auto Air Vent

Part: 172668

Price: £9.95
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Alpha 1.027110 Intec 2, Eco 2 Auto Air Vent

Part: 1.027110

Price: £20.00
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Glowworm Automatic de-aerator S1005600

Part: S1005600

Price: £14.95
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Biasi BI1212107 Automatic Air Vent

Part: BI1212107

Price: £12.75
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Main Air Bleed Valve 10/18728

Part: 10/18728

Price: £7.95
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Ariston 60000994 Air Separator

Part: 60000994

Price: £17.57
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Ariston 65104703 Clas He, E Combi Auto Air Vent

Part: 65104703

Price: £21.21
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Baxi 240396 Solo Pfl Auto Air Vent

Part: 240396

Price: £13.50
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Potterton Statesman, Heatmax, Promax Auto Air Vent 5122330

Part: 5122330

Price: £35.13
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Main Auto Air Vent 5122330

Part: 5122330

Price: £35.13
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Vokera 10029306 Linea He Unica Auto Air Vent

Part: 10029306

Price: £14.15
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Ideal 175804 Logic, Independent, I Mini Auto Air Vent

Part: 175804

Price: £19.95
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Alpha 1.022102 Cd Auto Air Vent

Part: 1.022102

Price: £12.00
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Ideal 075468 Henrad Auto Air Vent

Part: 075468

Price: £15.95
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Main Auto Air Vent 430000

Part: 430000

Price: £9.95
AK1020
Main Pump Airvent 720532801

Part: 720532801

Price: £19.95
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Potterton 5106932 Automatic Air Vent

Part: 5106932

Price: £13.75
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Worcester T00500087A0 Auto Air Vent Greenstar Compact

Part: T00500087A0

Price: £7.44
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Glowworm S801186 Auto Air Vent

Part: S801186

Price: £13.75
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Remeha 720532801 Automatic Air Vent

Part: 720532801

Price: £19.95
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Worcester Bosch 87161061420 Junior Auto Air Vent

Part: 87161061420

Price: £10.99
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Ideal 172525 Mini Auto Air Vent

Part: 172525

Price: £11.50
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Worcester Bosch 87161405000 Cdi, Highflow Auto Air Vent

Part: 87161405000

Price: £9.00
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Potterton Puma, Ultra Auto Air Vent 10/18728

Part: 10/18728

Price: £7.95
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Biasi BI1172111 Garda, Parva, Riva Compact Auto Air Vent

Part: BI1172111

Price: £11.50
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Chaffoteaux 571639 Auto Air Vent

Part: 571639

Price: £11.04
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Halstead 851025 Barlo Duo Auto Air Vent

Part: 851025

Price: £11.00
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Saunier Duval Auto Air Vent - 0020014161

Part: 0020014161

Price: £23.11
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Ariston 998643 Auto Air Vent

Part: 998643

Price: £12.00
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Ferroli 39801160 Optima Auto Air Vent

Part: 39801160

Price: £14.00
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