Refilling with water
Most of the taps require fitting with a small attachment. This is easier if you remove it from the hosepipe itself, and screw onto the tap first, before fitting the hosepipe on fully.
Uncoil the hosepipe until it comfortably reaches the filler cap.
Allow the water to fill right to the brim. If the tank is nearly empty, this can take as long as an hour, so pop the kettle on!