Hi Kiru and Robs!
Thanx for your feedback! :)
Answering Kiru's coment: I designed ArchiPIPE mostly for water and sanitary piping witch have "L", "T" or "Y" conections shapes. For the type of pipes you showed in the picture, I think the "ductwork" addon is the best option. What do you think?
Actually I have sent a new version of ArchiPIPE witch fix some bugs in the english version... Witch version are you using? The PORtugues or the ENGlish?
Cheers,
Brazuca