Glow-worm 0020097328 expansion vessel 10L

A genuine Glow-worm spare part, this expansion vessel is suitable for use in Betacom, Essential, Ultimate 3, Ultracom2, Home, Ultimate, Easicom, Energy, Sustain, Energy 7, MicraCom, Ultimate 2 and Energy 2 boilers. A chamber designed to protect water heating systems from excess pressure, the expansion vessel is filled with air which acts as a cushion against system pressure surges.