I just built a new pond, this video should explain it all. Let me know if you have any suggestions. Thank you.
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Flow Problem - Please Help
- Thread starter garrettmoore
- Start date
With no head the pump is puttng out about 18 gallons a minute.
What is a head?
And that's what the pump is supposedly rated for, 1150 GPH. But clearly it isn't flowing that much.
And that's what the pump is supposedly rated for, 1150 GPH. But clearly it isn't flowing that much.
Head is the amount of lift the pump has to overcome. It is measured in feet in most cases. More head means less flow.
The pond is probably two and a half feet deep.
Is that the flow you expect from that pump given that fact?
Or is the 3/4 inch tubing probably the problem?
Is that the flow you expect from that pump given that fact?
Or is the 3/4 inch tubing probably the problem?
Head begins at pond level and is measured at the highest point above that. So if you have a 24" waterfall, the head is 2 feet. Most pumps publish the flow at a given head.
So if the pond is 2.5 feet deep, and the waterfall is 10 inches (?) high, the flow chart on this pump (a Beckett 1150 GPH) says it should still be good for over 1000 GPH...
It doen's matter how deep the pond is, head begins at the ponds surface....
Garret please goto the UserCP and add your location.
So what do you think the problem may be?
koiguy1969
GIGGETY-GIGGETY!!
I DONT IF ITS YOUR PROBLEM, BUT...Going from 3/4" to 1" on the hose can make a nice difference. Always a good idea to go as big as possible. And 10' of horizontal hose run is equal to 1' vertical (head)
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The width of your waterfall also is a factor, the wider it is, the more flow you need to have a fast flow over it.
The first link is a on line calculator for the width of your waterfall:
The other two are more detailed math type calculations.......(first is easier)
http://www.pondliner.com/product/waterfall_flow_calculator/topic
http://www.engineeringtoolbox.com/weirs-flow-rate-d_592.html
http://www.aquatext.com/calcs/weir flow.htm
The larger your pipes, like they say, the better your flow will be too.
The first link is a on line calculator for the width of your waterfall:
The other two are more detailed math type calculations.......(first is easier)
http://www.pondliner.com/product/waterfall_flow_calculator/topic
http://www.engineeringtoolbox.com/weirs-flow-rate-d_592.html
http://www.aquatext.com/calcs/weir flow.htm
The larger your pipes, like they say, the better your flow will be too.
Your reduction of flow I suspect, is the pressure filter. The number of elbows you have will also contribute to lower flow.
I use the same pump and have about 4' of head, I get more flow than seen here. Make sure the pump cover is not clogged with leaves and junk. I have to clean mine a few times a year. That said, I use the Doc Filter which is free flowing and gravity return. You might want to reconsider your filter.
I use the same pump and have about 4' of head, I get more flow than seen here. Make sure the pump cover is not clogged with leaves and junk. I have to clean mine a few times a year. That said, I use the Doc Filter which is free flowing and gravity return. You might want to reconsider your filter.
Too small of tubing/hose causes friction that the water flow has to overcome. What is the largest size hose inlet your filter can adapt to.
koiguy1969
GIGGETY-GIGGETY!!
also, i'm sure you did... but if your adaptor (nipple) for the outhet hose is teired and takes 1/2" hose up to 1" or 1&1/4" (as some do). make sure you've cut the nipple to the size hose your using. a 1/2" opening into a 1" hose will still cause some flow reduction.... chances are its the filter, or a clog in the system maybe in the pump itself.