Over at ebay there is a guys selling a bunch of march pumps.
http://cgi.ebay.com/March-Recirculating-Pump-Ball-Bearing-Magnetic-Drive-/200459743883?cmd=ViewItem&pt=BI_Pumps&hash=item2eac54f28b#ht_4306wt_911
Is this what I would want to use for doing mash recirculation and sparge water?