In-ground pool filter

I just moved into a house with an in-ground pool and I'm pool-stupid! When the system is switched to backflush the pool starts to drain. Any ideas? Do I need tko post more info? I'm not sure where to begin.
Thanks.
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snipped-for-privacy@gmail.com wrote:

That's how the back wash works.
My suggestion as a guy who has beena round pools for over 40 years........ it isn't that hard but you've got to be shown how the whole thing works.
Installations & systems differ slightly.....kinda hard to do it over the internet
buy a book on pool care..Sunset mag has a one.
have previous owner (landlord?) show you the ropes
a neighbor who has a pool (trade dumb labor for instruction?)
a relative with a pool?
hire a handyman or pool man to show you
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The pool filter function obviously is to filter dirt & debris from the pool. Once the filter becomes saturated or full of dirt it must be cleaned to restore it to 100% efficiency. The filter is set to backwash & uses pool water to flush the dirt out of the system. Some filters have a bump handle on top to dislodge the debris while backwashing. You'll need to look on the filter to see if it is a sand filter or a DE filter. Sand would just need to be backflushed when the pressure builds. The DE filter would require the addition of new DE after cleaning. If needed you'll have to add water to the pool to maintain the proper level. The level is usually indicated on the skimmer box(inlet). Look at the frame around the skimmer you should see arrows on the frame indicating the proper water level. Hope that helps a little. Mike
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