I used 12" Sch 40 and when we put it together, we thought 3 of us would be able to handle it, but man were we surprised. It was no problem pushing fittings on the ends of the horizontal section. After priming and glueing for the next 20' stick, we picked it up and tried pushing it on, but could only get it a couple inches into the fitting and that was it.

So of course we all started freaking out and the contractor took off running down the backside of the dam and jumped into his excavator. It must have been a solid minute from when we started trying to push that thing in to when he got the machine in place. I would have bet a paycheck that there was no way that pipe would budge, but when he put the back of the bucket against the end of the pipe, it slid right in with no problem!

So from that point on, we just used the machine to push them together.