Wow..that great advice...thanks everyone (especially the bottle opener )
Can I ask another question...our tap is running slow since we drained and re-filled the water...any ideas? Have we got air in the system?
Could be a few things and I assume you can hear the pump working as normal. If so then follow the pipe from the tap back as far as you can behind the cupboards looking for water, it may have split or have a failed connector in which case water will be leaking out when pumping.
Another thing you can try is turn the pump off, turn the tap on, put your mouth around the tap outlet and blow, you should hear the air bubbling up into the water tank.
Lastly, if you can open the water tank, check the hose is firmly connected to the submersible pump - but if it is new you may prefer to get the converter to do this ( and watch how he does it so you know how to access the pump as they do stick now and again).