> An eBay search for:
>
> magnetic pump
>
> produces hundreds of results, some of them for small pumps costing less
than
> $100. Sorting by "price with shipping" groups similar products together.
>
> Perhaps not every one of them has a magnetically coupled impeller -
thereby
> presumably having no metal shaft or seals which could be attacked the the
> etchant. Maybe some of these are truly magnetically coupled, with an
impeller
> magnet totally sealed in plastic, and with enough pressure to drive spray
> nozzles.
I've got a couple of those that I paid $20 for
(
http://www.ebay.com.au/itm/280877928450), mine are 24V @ 1A, and claim
12.5L/min. The power rating is correct, I haven't checked the flow rate but
it does indeed pump water at a fair rate. It didn't mention pressure, and I
haven't tried. Presumably the same as another 24W pump.
They are also magnetically coupled, the impeller & shaft (with magnet) can
be removed, it has no metal.
I did read a bit of grumbling somewhere about how some type of acid would
attack the plastic and fail after a few weeks, I gathered this was the type
of pump they were talking about. I'm only using water so that's not a
problem, I can't advise on reliability either. I'm also running it in air,
not submerged.
Mine seems to match its advertising.
Tony