I can't speak to the basic problem, but as one who moved into a house
with such a set-up, it was a loser. This was a much smaller lake,
with occasional algae problems. The intake hung into the lake from
under the dock--down about 4 feet.
The "sprinkling system" consisted of moveable yard sprinklers on long
hose runs. No matter what we did, every filter in the sytem, or the
sprinklers, soon got completed clogged with debris---mostly algae.
Sank a 15' well, installed in-ground system. Works great.

On Wed, 30 Mar 2005 22:03:17 -0600, "Ron Bridwell"
wrote:

Dad and I did sprinkler installation for years in TX. Only saw one
installation like you are proposing. It was a very high maintenance
arrangement. The footvalve would pick up debris and the pump would lose
prime.