Hi everyone,
If you want to get a basic understanding of domestic plumbing, take a look at the RMIT (a university in Melbourne) website, which has a plumbing student's course notes online. Exceptional, and makes it much easier to understand AS3500:2.
https://www.dlsweb.rmit.edu.au/toolbox/ ... ge_001.htm
Check out this website for some standards, too.
ftp://law.resource.org/nz/ibr/
Happy study!
Cheers
David