The question is, is it food safe for hot wort (presuming that is what it will be used for).
Have you considered the 'little brown pump' from the UK - see http://www.solarproject.co.uk/page2.html
. Similar pumps available on ebay but not the more powerful models.
Very popular here in Australia and in the UK. And cheap.
These pumps have food grade materials in contact with the liquid being pumped, and magnetic drive (just like a March pump).
They are 12 volt DC and draw about 1 amp (depending on what model you choose) so you can power it from an old mobile phone (sorry, cell phone) charger or a car battery charger, or a multi voltage power supply.
Instead of controlling flow by throttling the output like with a March pump, you can just drop the voltage to 9V or 6V and the flow reduces. Nice.
Tiny pump that sits in the palm of your hand, but quite a powerful little beast.