Upgrade your Worcester Greenstar LXi/Si/i/CDi ErP Compact system with the genuine Zilmet Expansion Vessel, model 87186849450. Expertly designed for indoor mounting, this compact 5-litre expansion vessel is a crucial component for your hydronic (hot water) or gas boiler. Its robust metal tank lining ensures durability, while the grey finish complements your heating system's aesthetic. Manufactured in the United Kingdom in 2021, this expansion vessel is corded electric and boasts an A+++ to D EC range, demonstrating its energy efficiency. It is straightforward to instal with a bottom water connexion, and the unit is supplied as a single quantity with a 1-month manufacturer warranty for added peace of mind.