Question about Hayward SAND FILTER, PRO SERIES
The pressure doesn't last more than an hour, even right after back flushing and rinsing. And when I look at the water shooting into the pool, it looks very cloudy. Also, even when pump is running, it doesn't seem to be filtering well, as there are still bugs and a film on top of the water. I've had the pool 3 years and have never changed the sand in the filter. Could that be the problem?
Please open your filter and remove the top six inches of sand and replace with fresh filter media sand. You should be able to use the balance of the sand ... however, if it too is nasty, sand is relatively cheap and you rely on it a lot.
What is the pressure when you are running? What is your "start up pressure"? (the pressure when the filter is clean). Lets say it is 20 PSI start ... you should back wash when the pressure goes to 30 and the pressure should go back to 20 or 21 as a normal course of events after back wash
Is your water properly balanced? metal is out of the water? Proper TA and pH? TA should be about 100, pH about 7.4 ... CL 2 or 3 ppm. Do you use cynauric acid? should be about 35. Is your pool plaster ... MAKE SURE YOU GET RID OF METAL BEFORE YOU DO ANYTHING. Metal out works best with high pH and no CL. For a plaster pool CA shold be around 300
I hope this helps you ... thanks for your interest in FixYa.com
Posted on Jun 01, 2010
If you are on city treated water, sand will last aprox. 7 years, if on well water typically 3 - 5 years. so yes, could be a sand issue. also, double check that the there is no water trickling out the backwash / drain outlet of the filter, this could indicate that the diverter valve gasket (spider gasket) could be worn and cause sand from the filter to flow to the pool. this is a common problem if you move the position selector often with the pump still running - the pump should always be off when moving the handle. good luck!
Posted on Jun 01, 2010
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Posted on Jan 02, 2017
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