Glow-worm 2000802600 filling loop

A genuine Glow-worm spare, this filling loop is compatible with C-CI, Xtramax, CXI and Eden boilers. 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.