On Fri, 07 Jun 2013 14:27:39 -0500, dpb wrote:

I'm assuming this is a pretty low volume pump (as compared to irrigation
or power plant applications, say); I've never had a pool so don't know
just what they are.

The Sta-Rite System 3 Model S8M150 filter is max rated at
125 GPM (473 l/min.) at max 50 PSI (345 kPa).

http://www.pentairpool.com/pdfs/System3SMOM.pdf

Is 125 gallons per minute through 2" PVC pipe low or high volume?