The Vaillant 0020143508 Automatic Air Vent is a genuine replacement component designed to remove unwanted air from your boiler’s heating system automatically. As air naturally accumulates in the central heating circuit over time, it can lead to noisy pipework, reduced heat output at radiators and inefficient system performance. This automatic air vent allows trapped air to escape continuously, helping maintain steady water circulation, improve heat distribution and reduce the need for manual bleeding.

This air vent is compatible with Vaillant EcoTEC VU and VU series boilers that specify part number 0020143508 in their technical documentation. To ensure correct fitment and reliable operation, always verify the part number on your existing vent or consult your boiler’s service information before installation, as vent designs and connection sizes vary between systems.

Supplied ready for direct replacement, the 0020143508 Automatic Air Vent installs into the designated vent port and connects to the boiler’s system pipework without modification when fitted by a qualified engineer. Choosing this genuine Vaillant component helps maintain efficient circulation, reduces air-related noise and supports consistent heating performance in compatible EcoTEC VU/VU boilers.