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JoeSpareBedroom JoeSpareBedroom is offline
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Default Horrible Pool Accidents, Pump Covers

"Jeff Wisnia" wrote in message
...
Norminn wrote:
I just read an article about a horrible injury to a little girl in
Minnesota. This happened in a wading pool and it is difficult to read
about. Here is a link to the story:
http://wcco.com/topstories/local_story_185085504.html

It is summer and pool time, so take care of the little ones.



Someone's head(s) should roll over that kind of sloppy oversight and
maintenance.

But, I was puzzled by this line from the story:

********

In most public pools the drain cover is screwed in and cannot be pulled
off. According to the Consumer Product Safety Commission, the pressure on
some pool drains can be as strong as 300 pounds per square inch.

********

I don't see how a pool drain could suck with a force of more than one
atmosphere (14.7 psi) plus about another 1/2 psi for every foot of pool
water depth above the drain.

I think they must have meant a "total force" of 300 pounds sucking
something down against a drain opening of about 20 square inches or so.

Jeff (Hoping he hasn't forgotten his high school physics.)

--
Jeffry Wisnia



What about the suction being added by the pump which sends the water to the
filter?