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Open air relief and drain plug to allow air into filter and water out.
Take apart filter, remove all nuts/bolts/screws/fasteners and separate the filter. Could need some force to separate
Use a shop vac to suck out the sand or a cup, be careful not to be too violent, if you damage laterals sand will go into the pool
Check the laterals, No cracks or damage
Close drain plug.
Go to pool/home store buy POOL SAND. Amount required should should be posted on the filter somewhere. any extra will go into pool, or backwash out.
Add some water about halfway of the filter, slowly add sand back into filter, dont be too violent. be careful not to get sand into any piping it will go back into pool.
Prime the pump(add water to it) backwash the filter for 2~3 minutes
Close air relief
Run pump on normal open air relief as need to let excess air out .
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This is sort of a two-fold answer, as I am not exactly certain if you are referring to replacing the sand filter media itself or the sand.
Most manufacturers will tell you that the sand filter media itself is a permanent media filter. The only reason to throw the filter away would be after the sand calcifies into a solid block of concrete. The industry has spent 40 years telling the professional industry that sand is forever. Sand media is forever and you never have to change it.
However... this is what Hayward Pools is telling their customers:
On average, sand should be replaced every 3-5 years. The jagged edges of the sand wear down and become smooth as the sand ages. When this happens the sand can no longer trap debris particles and dirt can pass through the sand and back into the pool. As the sand ages, it may start to clump and the water flow can form channels in the sand, allowing the debris to pass through.
I have also talked with several others who believe what Hayward is saying, that basically every 3-5 years it should be changed. We have a strong belief in what Hayward says.
Hope that helps.
Mark
Bath & Spa Parts Online
http://www.bathandspaparts.com
When sand comes back from the filter, that means that the device inside the filter that keeps the sand in has broken. In order to replace the item, all of the sand must be removed and the tubes must be removed and new ones installed. Go to your local pool supply house with your filter information and they can show you how to remove your old units and they will sell you new ones. You only have to replace the ones that are broken.
That means that you have a cracked lateral in your pool filter. You will need to replace the lateral, which should stop the sand from entering your pool through the return line.
There is only one thing that can cause sand to come back into the pool from a sand filter. The internal assembly, called the lateral assembly, is either cracked or broken. This is an easy fix and should cost you around $70 to replace the whole thing. You need to unscrew the bottom drain cap on the filter to remove the water in the tank. Then, remove the multiport valve on top of the filter. Take a shop vac and remove the sand in the filter. If the sand hasn't been replaced in the last 3-5 years, this would be a great time to do that since you already have the sand out anyway. Then, remove the lateral assembly and inspect the entire thing. After you replace the lateral assembly, you'll need to fill the sand filter tank 1/2 full of water before adding fresh sand. This is done to cushion the laterals from the weight of the sand. Cover the hole in the top of the lateral assembly pipe with a cup or duct tape to prevent any sand from getting inside the pipe (the sand will come out into the pool if it gets into the pipe). Fill the tank 3/4 full of pool filter sand. Make sure it is genuine silica pool filter sand from a pool company. A lot of big box and home improvement stores sell play sand as filter sand. This will cause you more problems!
There could be a few things causing these problems. How old is the sand in the filter? Filter sand looses its filtering ability after 3-5 years and needs to be replaced. If the sand needs to be replaced, make sure you get actual pool filter sand. A lot of big box and home improvement stores sell play sand as filter sand. That will cause your pool to stay cloudy and never clear up. If the sand is less that 3-5 years old, you may need to clean it with a liquid filter cleaner that is poured through the skimmer. This works quite well!
Another issue causing the cloudiness and bubbles could be the type of chemicals you are using. I know that shock from big box and home improvement stores cause the water to be cloudy. Algaecides from these stores also cause foaming.
When sand returns to the pool, there is a hole in either the media or the sieve that is supposed to keep the sand in the filter.
All of the sand must come out of the filter, the sieve at the bottom (outlet of the filter) must be removed and any broken segments must be replaced.
The sand is then returned.
Gary
Your valve gasket is likely damaged allowing water to bypass the sand bed. Opening the valve you will likely see a damaged "wagon wheel with spokes looking" gasket. Try replacing it if it is at all creased or cut up.
if u used play sand, or any other type of sand thats NOT pool filter sand, that could be the problem. also if there is too much sand or too little sand that could also cause this.
sounds like the sand has clumped together inside filter. you can open filter and replace sand charge or dump into wheel barrow loosen sand and flush clean with hose and put back in
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