I had a Benraad balanced flue convector heater professionally fitted in my kitchen many years ago. I now wish to remove it. The quarter inch gas pipe from the heater terminates at the house gas outlet via a standard on/off connection fitted during the original installation. Can I just unscrew the connection (obviously leaving the on/off switch in situ) to remove the gas feed pipe to the heater and if I can, should the connection be capped off and what with?