PS Regarding the pressure test using the Halford's car foot pump, mentioned on the previous page. I had hoped one of the resident dummies would challenge me on using an air pump for a 15 bar pressure test, but they seem to have missed that one. You seem to have missed this one : Some years ago I used a cheap Halfords foot pump to pressure test an air compressor receiver; the receiver's working pressure was 10 bar, so I probably pumped it up to 15 bar. This I simply do not believe. ...and that one: He talks of going to 10 bar, most footpumps are easily capable of this. Don't think so mush, 10 bar with a footpump, most of them are falling apart if you get anywhere near 3. Now you're telling us you used it with a liquid as opposed to a gas. Which makes it about as relevant to this thread as the exploding superheated lorry tyre you previously brought up. Or don't you know anything about hydraulic effects. I suggest you go away and read some more of your books.