I have googled everything and cant seem to find much of anything...this unit
is 6-10 years old.
I am sizing a sand filter for a friend, her current motor/pump is a Magnatek
Centurion and as best as I can read( very faded), part number
12(or15)-177080-24 type Cx, rpm 3450 sf 1.65.
I am trying to determine the flow rate of this unit so as to purchase the
correct size sand filter( considering a 21 inch Hayward, 36 gpm I believe),
Her pool is 8400 gallons.
Can anyone enlighten me at all on the possible flow rate with the info I
you could use a garbage can or large bucket container with gallon
capacity on its label. pump hose into container, power on, how many
gallons per minute?
example: our pool pump is 1.5 hp for 12,000 gallons of above ground
24ft round pool x 4 ft walls, climate = buffalo ny. your task is for
your climate, determine the filter size so you don't work the pump so
hard that the backpressure is high.
as your pump gets old and noisy or self-destructs from going dry
consider a 2-speed pump. we use a 2-speed motor so as to be able to
shock or vacuum or skim on high versus use low for routine chlorine
circulation. your desirable water turnover thru the filter is faster
with the larger sand filter of course versus a smaller one.
see hayward filters:
without the amperage info, you may only have a small 1/2 hp. test
motor on a gfi with an ammeter?
see similar pumps at:
hidden factors in pool care could be nearby leaves, bather load,
blowing sand or dirt?
Meter the current and figure the watts and then the HP of the motor. I
would guess 3/4 HP. Learn GPM for a given HP pool pump via Google.
If you don't have a clamp-on ammeter, you could get clever and read the
utility meter with a stopwatch, turning the pump on and off.
Bucketing the water output is a very rough approximation, since you have to
alter the plumbing and head.
I appreciate the replies, the motor most definitely is a 1 hp unit, I could
make that out for sure, so that is not an issue.
I have google'd everything I could regarding what I know about this set-up
and found nothing specific, a few things close, but that doesn't count.
One thing I do know is that a 1 hp pump could range dramatically in flow
rate depending on the impeller and whether this unit is a high,med or low
head unit. THAT is what I am trying to find out
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