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#1
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Peeved over a gross disappointment
Ok, I bought a nifty, inexpensive magnetic-drive pump, a Pond Mag
Drive 700. Doubtless, a fine machine. What it isn't is, more powerful than my Little Giant PCL-025 475GPH. It's the same. I'd promised SWMBO it would be noisier. Bummer. |
#3
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On 26 Aug 2004 23:04:37 -0700,
(John) wrote: ===Ok, I bought a nifty, inexpensive magnetic-drive pump, a Pond Mag ===Drive 700. ===Doubtless, a fine machine. What it isn't is, more powerful than my ===Little Giant PCL-025 475GPH. It's the same. I'd promised SWMBO it ===would be noisier. Bummer. I found the Little Giant PCL-020 that I just bought to be kind of noisy........unless its running with no restrictions. Just ever so slightly reduce outflow and it makes noise.........At full flow it was much to much for a decent effect coming out of the hand pump aereator......Reduce flow and you had noise........my solution was to punch a few holes in the plastic tubing that connects the Little Giant to the hand pump feature and allow some flow to be diverted prior to getting to the hand pump and noise all but went away. One thing lead to another though. I used the hole punch thingie that is commonly used to punch holes in the plastic drip irrigation system tubing. I inserted a T fitting and attached a piece of the 1/4" low pressure drip irrigation tubing to the T fitting, and ran it to thr opposite side of the tub under water, where it discharges. It sets up a sort of circular flow of water along the tubs perimeter. Adds more circulation that is not forcefull and dumps some built up pressure on the pump and eliminated the noise pump had when it had flow reduced with ball valve. I imagine you could install one of those micro drip irrigation mister or sprinkler heads and use it as an aereator as well, or a sort of miniature fountain in a small water garden tub. Visit my website: http://www.frugalmachinist.com Opinions expressed are those of my wife, I had no input whatsoever. Remove "nospam" from email addy. |
#4
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#5
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~ jan JJsPond.us wrote in message . ..
On 26 Aug 2004 23:04:37 -0700, (John) wrote: Ok, I bought a nifty, inexpensive magnetic-drive pump, a Pond Mag Drive 700. Doubtless, a fine machine. What it isn't is, more powerful than my Little Giant PCL-025 475GPH. It's the same. I'd promised SWMBO it would be noisier. Bummer. What would be noisier? The pump or water fall? Water fall. Pump is pleasantly inobtrusive. If waterfall, perhaps it is the tubing you're using, not the pump that is the problem? Go to a bigger diameter On further reflection, I seem to be suffering from the erroneous impression that, for pond distances (5-15 feet), a hose needn't be any larger in diameter than the pump outlet, as if we were discussing electricity, here. Although I've doubled the diameter of the hose over that of the original, there is only cheapness keeping me from buying another even larger hose. |
#6
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artships wrote:
On further reflection, I seem to be suffering from the erroneous impression that, for pond distances (5-15 feet), a hose needn't be any larger in diameter than the pump outlet, as if we were discussing electricity, here. Although I've doubled the diameter of the hose over that of the original, there is only cheapness keeping me from buying another even larger hose. You're absolutely right. Surprisingly, the outlet size has little effect on the amount of water you can pump through a large enough hose. There is a limit to how much increasing the size of the hose will help, but if you take your hose, straighten it out and measure the flow, and it's appreciably less than your pump puts out without a hose, you should probably use a larger hose. Then, when you run the plumbing, make your corners as gentle and as few as possible, because every corner lowers the flow. Or you can just consult someone who knows how to calculate the head loss due to your plumbing. We used to have someone here... -- derek |
#7
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artships wrote:
On further reflection, I seem to be suffering from the erroneous impression that, for pond distances (5-15 feet), a hose needn't be any larger in diameter than the pump outlet, as if we were discussing electricity, here. Although I've doubled the diameter of the hose over that of the original, there is only cheapness keeping me from buying another even larger hose. You're absolutely right. Surprisingly, the outlet size has little effect on the amount of water you can pump through a large enough hose. There is a limit to how much increasing the size of the hose will help, but if you take your hose, straighten it out and measure the flow, and it's appreciably less than your pump puts out without a hose, you should probably use a larger hose. Then, when you run the plumbing, make your corners as gentle and as few as possible, because every corner lowers the flow. Or you can just consult someone who knows how to calculate the head loss due to your plumbing. We used to have someone here... -- derek |
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