Thats what I was thinking but strangely there dont seem to b a jubilee clip holding it on so I guess I dont undo the nut just tug on the pipe. Then on the new rubber pipe fit a propper jubalee clip or similar. So once I do this the petrol will poor out. I know there is at least two petrol cans in there cos I put that in there a couple of months ago. Can I just catch this in a bowl and put in back in ?