How to stop a PVC pipe from leaking from the pool pump pipe
You can use PVC glue if it is leaking at a joint or valve. If it has burst at some place, an elastic bladder will seal it well if it is not over a large area. Here are other tips on how to seal it; http://www.ehow.com/how_2306732_stop-leak-pvc.html.
Get that info-mmercial stuff in a spray can they've been flogging lately. They put a screen door in the bottom of a row boat and spray the stuff over the screen and off they row...merrily, merrily...it works.