Vaillant Expansion Vessel (Ecotec)

Vaillant Automatic Air Vent is designed for the pump section of Vaillant's Guernsey or Jersey (condensing), Ecofit VUW (condensing), Ecotec VU (condensing), Ecotec VUW (condensing), Home (condensing), Thermo compact VU (fan-assisted), Ecofit VU (condensing), Turbo max VUW (fan-assisted) and Ecotec VUI (condensing) boilers. The air vent, being a central heating safety device, releases built up air.