You can refurbish them Oliver but the cost of 'breaking down' the unit, cleaning, using a new barrier, refilling with gas and resealing always exceeds the cost of a replacement unit. I now, I tried!Plus of course you have the problem of a bloody great hole in the wall while you are trying to fix them.If you are able to remove the sealed units yourself and measure for new units I can thoroughly recommend Christie Glass in Mitcham. A bit of a trek but they take online orders and are REALLY cheap for the supply of sealed units.
Nigel Brooks ● 4626d