Hey Rich,
I should have just kept quiet -- you answered while I was writing...
David

On Mon, 11 Apr 2005 20:09:27 -0400, "RichToyBox"
wrote:

Chris,

Put a valve in the bottom drain line between the pond and the first barrel.
Periodically, close the valve and pump the drums down, then open the valve
and the water will rush through at such a pace as to flush anything in the
line.