This water line connection kit, installed by a plumber, allows the water tank to automatically re-fill. Water connection allows for uninterrupted operation of your Jura Commercial coffee center. External water filtration is also required, but some water hardness is required. These water line kits will not fit on models designed for the home. The GIGA models require a piece of the water tank to be cut out.3 different kits are available: this one for the Jura XS90, X8 or the GIGA X7 & GIGA W3, one for the X9 and one for the XJ9 espresso water line.