On Thu, 11 Oct 2007 12:40:12 +0100, Perry Mitchell wrote: > Oh dear - as they say - a little knowledge is a dangerous thing! > > Pure water is an insulator, although quite how pure is the water in your > pipes is another matter! Well...I doubt very much that the water in the pipes is pure H2O. . . . . . . . . . . . . . . . . . . . . . . O'Brien