If you use a skimmer box, you can plumb the drain right into the front of
the box (underneath the skimmer opening) without needing to go "up and
over."

I have one bottem drain in a 15'x30'x4' and it works great. A lot will
depend on the contour of the bottom of the pond.

mmendell
"RichToyBox" wrote in message
news:%FN4c.2155$JL2.47891@attbi_s03...
You can have the pipe go up and over, but you need to install a Tee and
valve at the top to let air out. Put a backflow preventer between the top
and the bottom drain location to prevent water running back to the pond.
Force water in backwards from the pump or settling basin until all air is
out of the top location, and then it will siphon. Periodically, you will
need to do the forcing of the water, to evacuate the air, since some air
is
in the water and that is the location of the highest vacuum, and some air
will separate from the water and accumulate in that location.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html


"Fernando Rivera" wrote in message
...
I would like to know if anyone can help me out with a couple questions.
I
would like to add a bottom drain to my pond with having the plumbming on
top
of the liner, is this possible? It's to late to redo the pond and less
cost
effective. Is there any ideas or suggestions, any help would be
appreciated.
My pond is currently 12,000 gallons. And i would like an easier time of
cleaning the bottom.