Rainwater strap boss?

[Agile]

The usual way that is done is to use a "Y" branch connector and an internal reducing fitting which I think are available for several different sizes but certainly for 2" rainwater which could probably be rubber reducer reduced to the smaller waste sizes.

Tony

 

[Hugh Jaleak]

82mm (3") would be less obtrusive then 110mm, but then presents the issue of connecting the 68mm downpipe. 68-110mm adaptors widely available, not aware of a 68-82mm though.