Thank you for the replies. The friction loss chart was very interesting; I'm
not sure I totally understand it, but I get the general gist. To be honest,
this is exactly what I expected to hear but what I most dreaded. There is no
easy way to run a new pipe to the waterfall. Even the easiest route means
excavating about 20 feet of rockery that has been in place about 25 years
and a pathway that crosses the rockery.
Maybe I need to have a complete rethink of my strategy. I desperately need
to get a filter but perhaps I should get a pressurised filter that I can
site away from the pond and run the pipes under the lawn. I know that wouldn't
solve the waterfall problem but maybe I'll have to live with a reduced flow
until I get the inclination to redo the rockery. Another advantage to that
would be that I could switch the waterfall off at night. I have been worried
what the neighbours might say about the noise! What do you think?
Also, I would be interested to hear what diameter pipe people commonly use
for connecting pumps to waterfalls in a pond of my size (about 1400 imperial
gallons) or is it just a case of using the biggest they can find?
Thanks again.
Jay.
"~ jan" wrote in message
...
On Tue, 19 Jun 2007 11:14:03 CST, "Anon" wrote:
I've recently bought a pump and biofilter for my pond. The pond is about
1400 imperial gallons and is heavily stocked with fish. I've positioned
the
biofilter above the waterfall which is about 6ft above the water level and
about 10 metres away from the pond, the waterfall lip is about 18 inches
wide and is connected by a stream. I bought a Yamitsu 12000 solids
handling
pump and a Green2Clean 24000 filter which, in theory should both be more
than adequate for this pond. Unfortunately when the pond was built they
used
18mm internal diameter pipe to supply the waterfall from the pond. As a
result the flow at the waterfall with this pump and biofilter is not much
more than a trickle. I have run a 38mm pipe between to test if this makes
a
difference and it is much more acceptable. However, the original pipe is
buried in the ground under the pond, stream, rockery and waterfall, and
changing it for wider pipe would be an absolutely mammoth task that I
would
prefer to avoid at all costs.
My question is: would getting a more powerful pump fix this problem? I
have
had differing advice at several pond stores. Some say that the more
powerful
pumps produce massive volumes of water but not a lot of pressure so would
still struggle to force the water up that diameter pump. Although at one
store I was told that narrower pipe is better as it creates more pressure
than wider pipe.
I would very much appreciate your comments and advice.
Jay.
What SD Joe said, diameter of pipe decides the flow, regardless of force.
Check this link. It is from the makers of Sequence pumps.
http://www.mdminc.com/Friction_Loss_Chart.htm
My first set up was with a garden hose that I buried. I just cut it off
below ground and left the rest. ~ jan
------------
Zone 7a, SE Washington State
Ponds: www.jjspond.us