I've spoken to the installer. He said that it is not against the regs to use the same hole as the flue for the 'bloe-off'. He also said that Vaillant do not object if no other method is available.
I said the boiler was 'At Risk' and he just laughed at me saying it would never reach the stage...
Hi
I've just had a heating system installed. Vaillant 831. Happy with the work. System was properly flushed and instaler went through controls,operation etc.
However, looking at it from outside i have noticed that the pipe from the pressure valve comes out of the same hole as the flue. I...