Quote:
Originally posted by myv65
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I have no hard evidence to back up the next statement, but consider it "gut instinct". With joe-typical pond pump, cavitation is not likely provided you have a straight run of at least five diameters (preferably a little more) heading into the suction AND you do not reduce tubing diameter below the pump's intake diameter AND actual flow is less than ~2/3 of zero head flow.
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I learn something, every time you post, thank you!
That's a range that may or may not fall within what an average Joe might have.
-The "2/3" of full flow is going to be a yes, in 99% of cases.
-I believe that most pumps are bottom mounted, or at least all the ones I've seen have the 5d run above them. There might be a few exceptions.
-I surely hope that everyone has learned not to reduce the pump's intake, following pHaestus' great article.
On the topic of "d's", I recently picked up an article in "Flow Control" mag that stated that a 20d run would be preferable, above and below a flow meter, without any diameter changes. Any thoughts on that?
Here's the full article.
As you might remember, I picked up a rotameter recently, and I'm looking into the feasability of incorporating it into my case, which is ~ 26 inches tall. The meter has 1/2" NPT connections.
Here are the details of the meter.