For best installation practice please observe the following:
Avoid any contact with the walls of the room when fitting the tank.
Make sure that the anti-vibration pads are properly stuck underneath the tank at the indicated locations, to minimize vibrations.
Screw the fastening tabs to the floor to prevent the appliance from moving.
Position the tank on a perfectly level floor so that the anti-vibration pads can work effectively.
Fasten the outlet piping correctly avoiding any distances between attachments in excess of one metre.