heres the original post/plans(i made alterations to mine)
Went to Wal-Mart and bought two clear rubbermaid food containers. A 1gal and a 2qt. By luck the diameter of the mouths is the same as a 4" pvc . The tops are threaded and will screw snuggly into the 4" pvc female adapter. I bought 2 female adapters and a 4" to 2" adapter. To put it together I screwed the one female to the 1gal container the other to the 2qt container. To join them I fitted the 4" to 2" onto the 4" female on the 1 gal, and siliconed the 4" female from the 2qt to it. A piece of 2" pvc is slip fitted into the 2" part of the adapter for a riser tube.
For the input I used a 1/2" male threaded adapter on the inside of the container I made the hole just slightly smaller so that I could screw the piece snug. I used a female threaded on the outside to make a sort of bulkhead. I did the same for the outlet but used 3/4" pvc instead. They are not watertight but pretty close if I had bothered with a gasket or silicon it would be, but since it is intended to be in sump I didn't care.
For pump I'm using a mag 5 that I had. I made the "venturi" for the intake out of a 1/2" pvc tee, with a female threaded top t. I screwed in a male threaded hose barb for the air supply. To get the "venturi" effect I boiled the tee till soft and smushed the middle right under the air supply. This fitted onto the input of the mag 5.
