On Fri, 22 Apr 2005 05:04:49 GMT, "Rod Out back"
wrote:

Folks,

Got a mate who just installed a new garden fountain at his house in
Gracemere QLD; one with a 240v submersible pump. There is a filter on the
pump, and it seems to clog up within 18 hours, and it needs to be cleaned
out. Mate says there is barely a few bits of gunk in the filter, but they
then get another 18 hours of steadily diminsihing pressure till they need to
clean the filter out again.

Now, it sounds to me like there is something more like an air-lock
occurring, which is reduced when the filter is removed, rather than simply a
blocked filter. Mate says the amount being cleaned out of the filter is a
very small amount of crud, and they then get another 18 hours run-time.

Anyone run across this? It sort of sounds like there is an additional
problem, or alternately the filter is unbelievably fine. Doesnt sound quite
like the filter, though, as the amount removed doesnt sound enough.

Thoughts and ideas I can feed back to him welcomed.

Cheers,

Rod.......Out Back

g'day all,

This problem seems similar to what farmers face when getting water
from their dams when they are getting low.

Have a look at the ABC site fro the "New Inventors".

I think there was something made up to solve this problem on a larger
scale but could probably be scaled down for your pond pumps.

It was all about "Slowing" down the flow into the intake filter.

This was effected with a dish like arrangement. whereby they were able
to get just about the "last Drop" out of an empty dam without the
problems.

Tony