old high rise sanitary systems

[anaylor1986]

Can anyone please tell me what type of system this is and what are the advantages of doing it like this???

 

[leakylea]

may be a picture or diagram?
we plumbers are good and often have to be mindreaders, but a litte help goes a long way

 

[justlead1]

Hi. The 2 pipe system has 4 pipes and 1 pipe system has 2 Designed to stop people chucking it out the window and epidemic of cholera, diphtheria, the plague etc. Give move info please.