On Wed, 3 Dec 2008 09:50:08 EST, Dude wrote:
Hi Chris,
My question for now is regarding the bottom drain. If you take a look
at the picture you will see I have a black PVC 2" pipe in the channel
I cut for it. I don't necessarily need it to be able to completely
drain the pond although that would be perfect, but I would like it to
be able to take about 1/3 of the water out for changes and cleaning
out some of the muck on the bottom. Will the water pressure be enough
to push up that slight grade that you see the pipe in to let the pond
drain?
Have you got a bottom drain that has a connection for a 2inch pipe? The
only ones I've seen are for 4inch but I don't really take a lot of
notice of them.
The water won't push up the pipe unless you have it sealed so that it
can act as a syphon and even then the outlet must be below the water
level at all times for it to work.
Can't answer about the skimmer but if you were to use 4inch pipe from
the bottom drain, run it horizontally until it's clear of the pond and
then put an 90 degree elbow in to bring it to the surface you could
drop a small pump in when you wanted to drain it. You may be able to
get an aquarium internal pump that will fit and can have a hose
connected alternatively have a look at sewer fittings for example:
http://www.bes.co.uk/products/132.asp and fit an inspection chamber
that you can put your filter pump in and then use it to drain the pond.
Obviously you will need one that is watertight when full of water and
the side riser in the URL won't be but I have seen single piece ones.
Larger diameter hoses/pipes are always better for flow than small
diameter ones and the solid pipes can give 40% better flow over a
flexible one in some cases.
You can see the effect on water flow in the last two pictures here
http://www.infohitsystems.ltd.uk/Gal...to.sh?path=PND when
we upgraded from 40mm flexible to 50mm solid using the same pumps.
--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail ngpsm4 (at) infohitsystems (dot) ltd (dot) uk