Ah, the almost incandescent rage of a tradesman as he swears and gets angry, almost blaming you the Householder for the original placing of pipes, the original wiring etc, the garage mechanic who will almost give out to you because your car is French.
Of course a lot of it is just a whizz to try and make the job appear more difficult and thus an excuse to raise the price.
Just fix it you ****, I have things to be getting on with, television to watch etc.