Waterfall Pump

That's exactly what I want. Pump to falls only. I will use another pump
for my filtering. Wouldn't the increased volume of water (in weight) in the
pipes negatively effect the flow on a 4 foot head?

- Francis

"Jim and Phyllis Hurley" wrote in message
. ..
If you use 2" piping to the falls, your resistance will be less and your
pump will be more effective, despite the 1 1/4 exit.

Jim

--
____________________________________________
See our pond at: home.bellsouth.net\p\pwp-jameshurley
Ask me about Jog-A-Thon fundraiser (clears $120+ per child) at:
jogathon.net

"Francis" wrote in message
. rogers.com...
I would like to get a new waterfall pump (PowerJet WG 10,000... 137
watts
@
2900 GPH). It seems to be a pretty energy efficient pump for the flow.
It
has an 1 1/4" discharge. My question is that should I use an 1 1/4"
pipe
from the discharge or actually use a 2" pipe, as maybe this would be
more
efficient for the pump.

- Francis

No. The pressure from the weight of the water is the same psi regardless of
the size of the pipe. The reason for going larger is to reduce flow rate
within the pipe. Faster flow means more friction, and consequently lost
energy.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html
"Francis" wrote in message
t.cable.rogers.com...
That's exactly what I want. Pump to falls only. I will use another pump
for my filtering. Wouldn't the increased volume of water (in weight) in
the
pipes negatively effect the flow on a 4 foot head?

- Francis

"Jim and Phyllis Hurley" wrote in message
. ..
If you use 2" piping to the falls, your resistance will be less and your
pump will be more effective, despite the 1 1/4 exit.

Jim

--
____________________________________________
See our pond at: home.bellsouth.net\p\pwp-jameshurley
Ask me about Jog-A-Thon fundraiser (clears $120+ per child) at:
jogathon.net

"Francis" wrote in message
. rogers.com...
I would like to get a new waterfall pump (PowerJet WG 10,000... 137
watts
@
2900 GPH). It seems to be a pretty energy efficient pump for the
flow.
It
has an 1 1/4" discharge. My question is that should I use an 1 1/4"
pipe
from the discharge or actually use a 2" pipe, as maybe this would be
more
efficient for the pump.

- Francis

"RichToyBox" wrote in message
news:eecsc.103911$xw3.6129253@attbi_s04...
No. The pressure from the weight of the water is the same psi regardless of
the size of the pipe.

Actually, you may want to recalculate that.
A 1-1/4" pipe 4 ft long will contain0.3 gallons = 2.50 pounds
A 2" diameter pipe 4 ft long will contain 0.7 gallons = 5.84 pounds
The OP does not say how long the run is, but did say it was a 4 ft rise. Using a
2 "pipe will more than double the back pressure on the pump.

Mike
Just learning about ponds, but quite familiar with pumps... ;-)

"AlienZen" writes:

"RichToyBox" wrote in message
news:eecsc.103911$xw3.6129253@attbi_s04...
No. The pressure from the weight of the water is the same psi regardless of
the size of the pipe.

Actually, you may want to recalculate that.
A 1-1/4" pipe 4 ft long will contain0.3 gallons = 2.50 pounds
A 2" diameter pipe 4 ft long will contain 0.7 gallons = 5.84 pounds
The OP does not say how long the run is, but did say it was a 4 ft rise. Using a
2 "pipe will more than double the back pressure on the pump.

Pressure is pounds per square inch, not pounds. Try
dividing he weight by the area.

For example, the pressure at the bottom of a vertical 20
foot pipe full of water is the same regardless of pipe
diameter. It's one of those counter-intuitive things about
plumbing...

You could be pumping into the bottom of a pool 4' deep containing several
tons of water and the pressure would still be exactly the same as at the end
of a 4' pipe. Pressure is in pounds per square foot.

-- Mark

"AlienZen" wrote in message
...

"RichToyBox" wrote in message
news:eecsc.103911$xw3.6129253@attbi_s04...
No. The pressure from the weight of the water is the same psi
regardless of
the size of the pipe.

Actually, you may want to recalculate that.
A 1-1/4" pipe 4 ft long will contain0.3 gallons = 2.50 pounds
A 2" diameter pipe 4 ft long will contain 0.7 gallons = 5.84 pounds
The OP does not say how long the run is, but did say it was a 4 ft rise.
Using a
2 "pipe will more than double the back pressure on the pump.

Mike
Just learning about ponds, but quite familiar with pumps... ;-)

Water weighs 62.4 pounds per cubic foot, so one square foot by one foot high
weighs 62.4 pounds. That translates to just over 0.43 pounds
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.htmlper square inch. That is
the pressure regardless of the size of the pipe. Now to hold the pipe up,
you would need a support that would hold the whole 62.4 pounds, but to push
water in or let water out, the pressure is what a pump would be pushing
against.
"AlienZen" wrote in message
...

"RichToyBox" wrote in message
news:eecsc.103911$xw3.6129253@attbi_s04...
No. The pressure from the weight of the water is the same psi
regardless of
the size of the pipe.

Actually, you may want to recalculate that.
A 1-1/4" pipe 4 ft long will contain0.3 gallons = 2.50 pounds
A 2" diameter pipe 4 ft long will contain 0.7 gallons = 5.84 pounds
The OP does not say how long the run is, but did say it was a 4 ft rise.
Using a
2 "pipe will more than double the back pressure on the pump.

Mike
Just learning about ponds, but quite familiar with pumps... ;-)