GardenBanter.co.uk - OT reminiscences of my dad--was: Multiple pumps for failure

i keep thinking that my dad would have loved computers. when i was a kid we
had fancy radios, transistor radios, a shortwave radio, a movie camera, an
early hand-held calculator, the first TV on our block with a 100 ft tall
antenna, and a CDR rotor to turn it. our car had every gadget known to
detroit on it. yes, he would have loved home computers.
mad
--
You don't stop laughing because you grow old, you grow old
because you stop laughing.

From: "Anne Lurie"
Organization: Road Runner - NC
Newsgroups: rec.ponds
Date: Tue, 26 Aug 2003 23:25:22 GMT
Subject: Multiple pumps for failure protection?

Not much of a comment, except to say:

Oh, man, how my father would have loved newsgroups with questions like this,
sigh...... He was an engineer, we had a house on Lake Erie, and a cottage
on Georgian Bay........ he used to get the monthly(?) reports from the Army
Corps of Engineers about water levels on the Great Lakes. And, I swear,
only my dad could get excited when he talked about "acre feet" (the amount
of water necessary to cover one acre with one foot of water).

Through in a question about pumps in parallel, and he would have been in his
element, sliderule & all!

[I realize this post was of no help whatsoever to Scott, who asked the
question, but the memories that the question evoked are priceless.]

And then's the question that occurred to me when I read an earlier thread
(very embarrassing not to know the answer, as I'm sure I should know it):
"Does a pump have to work harder to move water that's 6 feet under the
surface than water that's 2 feet under the surface"?

Anne Lurie
Raleigh, NC

"Scott Evans" wrote in message
...
In a recent posting here, someone had lost their pump, and was wondering
what needed to be done to keep their fish safe until a replacement could
be found/installed. That got me thinking (never a good thing, but I
digress) a bit about how to minimize the short-term impact of a pump
failure. Going under the assumption that it takes a certain amount of
power to pump a given quantity of water, would it make more sense to
have multiple smaller pumps hooked up in parallel (with appropriate
back-flow check valves) rather than a single large pump? It shouldn't
take any more power to pump the water; the only additional cost would
be the initial plumbing and pump costs. It might be a worthwhile
tradeoff for peace-of-mind to put out a little more money upfront to
make sure that a pump failure won't take down a whole pond ecosystem.

Comments?

Scott

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