Sean, we did not pump the water out, but we did make sure it was a slightly dry mix in one and used the water and a piece of rebar to mix it in the pipe in another. Using the mix was easier and it pushes the excess water out itself. We used a big cheap plastic funnel to route the cement into the places we wanted it. The 4x4's allowed us to put cross bracing in easily by just nailing and bolting, not sure how you would do that on a piece of pvc
