I'm trying to make the bell siphon shown here http://www.underthechokotree.com/index. ... &Itemid=37
I've got most of the parts mail order from Hansen's but can't find the 25mm diameter pipe riser with male threads on both ends. Also, finding pipe work for drainage in small lengths is also a mission. I've managed to get some clear PE tubing from Bunnings but because it's clear, it's not ideal.
At present because I couldn't find the risers, I am using a couple of drink bottles to create the bell and it's working .. sort of.