Product code: 491811
This Worcester Bosch charging key assembly is compatible with Greenstar, Si/C1 Series, Greenstar ErP, Compact, i Junior Series and RD Series boilers. It is part of the unit's filling loop. For use in central heating boilers and systems, allowing the user to manually top-up the amount of water in the system if the pressure drops. External loops are usually removable in keeping with regulations, while internal filling loops normally feature a key that can be removed to interrupt the connection after use. To help you find the right parts for your jobs, go to the industry leading parts identification tool, PartsArena, giving you quick access to over 20,000 exploded diagrams, 10,000 images & 20,000 products. FREE to Wolseley trade account customers.