Extending air Bricks Through Extension to old Property Ask questions and find answers on a range of subjects relating to self build projects

[AshCreights]

I was thinking of using two lengths side by side of 40 mm underground electrical conduit to extend my telescopic vents through my concrete floor to my old property, these then could be inserted to the telescopic air brick, I know 110mm drain pipe is common but I thought this would be easier any thoughts.
Regards
Ash