Use 4-in.-diameter 'Schedule 40' PVC, which is available from home centers. Here's how to do it: Lift the front edge of the ...

You can also buy new pipe; it's relatively inexpensive. Lowe's sells 10-foot lengths of schedule 40 PVC Charlotte pipe for ...

In this case, [OtisLiu153] strictly recommends 150 psi as a limit, which is nicely within the 280 PSI rating of the 2″ Schedule 40 PVC being used. Though, as they note, the connections in the ...