There are two possible problems. 1. The filter valve gasket needs to be replaced. If the gasket is bad it will allow sand to pass through the filter ports and either enter to pool or go into the backwash line. 2. The laterals in the bottom of the sand filter are damaged. You will need to remove the sand from the tank and inspect the laterals. You can see a diagram of the inside of a sand filter here http://everything4pools.com/parts.php?cPath=56_64_103_131 Answer #1 is wrong !! You have inadvertantly dumped the sand into the filter without covering the stand pipe coming up from the lower center of the filter. The sand may eventually stop coming thru as it is consumed by sending it out to the pool. The stand pipe is full of sand and will take a while to clear. You could open the filter and remove all the sand and start over after removing the stand pipe and cleaning the seat or the stand pipe. Once cleaned replace the stand pipe then tape a cup or a heavy plastic over the top of the stand pipe then refill the filter with the #20 silica sand. Once you have added all the required amount of sand then clean the seat and o-ring area before mounting the valve. Start the filter in the B/W position and run briefly to clear, stop the pump and rotate the valve to "filter".
Well i have a pool myself, and sand is not wanted in it. The rocks in it can puncture the liner (if it has a liner). You should vacuum it out with a pool vacuum.
Hope i helped
12-16 pounds when it gets toward 20 pounds the pool needs to be backwashed
No absolutely not unless you want to waste a lot of water you backwash a pool when the pressure in front of the filter becomes too high or goes into the red.
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It needs to be changed it is getting broke down and going thru the plastic ports and back into the pool
Sometimes when my mom and dad gives the chemical anyway the pool.
She dipped her toe into the pool and the resort had the pool drained and cleaned. I believe it happened in Las Vegas.
The best way to determine this is to backwash the filter and see what the pressure is at that time. Then go 7-10 PSI above that and this will be your pressure to watch to tell you when to clean your filter.
You could drain your pool and have it cleaned. Or just have a pool cleaner clean it for you. And next time use chlorine to prevent larvae from hatching in your pool.
The shock in your pool will be completely diluted within minutes. Shock is just a super chlorinator so you can test your water to see what chlorine level you have achieved
it is safe but not healthy for your body
The dirty and non-cleaned swimming pools