When should we replace sand

Hello, David -

The information on these 2 web pages may prove instructive:
http://www.poolcenter.com/sandPoolFilter
and
https://www.clean-pool-and-spa.com/pool-sand-filter-problems.html

Best wishes.

Before you hook up the vacuum attachment, you want to flood the vacuum hose with water or your pump will be air locked. Submerge the hose and fill it with water. These centrifugal pumps must be primed in order to work. Another method is to fill the vacuum hose with water from a garden hose.

The back pressure at which it's time to backwash a sand filter is about 6-8 psi above the baseline pressure of a clean filter. Just after following the procedure to backwash and rinse your filter, check the sand filter's back pressure at the time you return the pump and filter system back into filter mode. This is the baseline pressure of your clean filter. As the filter gathers particulates from the pool water, the back pressure will rise over time, as indicated on your pressure gauge. Once the pressure reaches 6-8 psi above the baseline, it's time to backwash.

Some advice: Don't assume the baseline pressure will remain the same for your sand filter. The baseline pressure will change over time and when the sand media is replaced. Typicallly baseline pressure will go up slightly over a season due to captured particles that are difficult to backwash out. Use of a filter cleaner will help remove these captured particles.

More advice: Even with the use of filter cleaners and proper backwashing, sand media will not last forever. The constant water flow and movement of particles in the sand over time shears the surface of each little sand grain. Like a river flowing over rocks, over time each sand grain surface is smoothed, and thus its effectiveness for capturing small particles is reduced with ongoing use. A typical rule of thumb is to replace the sand media +/- 5 years. Some pool owners do it more often, some less. It depends on how long your pool season is each year and how much debris the filter much extract from the pool water.

too many chemicals will cloud contact the company website or did you maybe its the water change the water

1st unplug pump and cover with waterproof material
2nd unbolt band that passes around the center of sand filter
3rd use wet/dry vac to suck the sand out and dispose of it ,dont reuse it
4th after sand is gone you can see areation fingers well , replace any and all that seem bent/cracked
dont forget to relube the o-ring joint/ s with waterproof grease (plumbing part) before putting back together

im gonna guess that you stored the filter improperly off season and now the sand charge is hard as cement inside not alowing water to get thru , left alone for a week or so it might loosen up , but the best thing is to dissasemble filter and remove all sand and ck "fingers" inside this is fastest way
i allways use RV antifreeze 30/1 to store any pumps or filters off season , RV type because its nontoxic

Thank you for posting your question here on Fixya.com.

You need to empty the sand out and replace the lateral assembly too. It attached to the bottom of the valve and has several 'fingers' embedded in the sand. Once it wears enough, the sand can get thru it. Replace the sand if it is over 3 years old while you are at it. A wet/dry vacuum works well for removing the sand.

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John

the pulse reader signal from you yellow port has burnt out your best of repalcing the whole unit

sorry
good luck

Only thing u can do is restart this happend to me on my ps3i called sont because i thought it was a problem with the ps3 but it wosent only thing u can do is restart ur season agen and hope it dosent happen agen like me i was on my 6th season wen this happend but now im on my 4th good luck.

How does the belt fit in the groove? It should fit well with no space under the belt (which, if it were too wide, it would have a space). A belt can get 'glazed' over time, and slip and cause the squeal you describe. If the belt is dried up, oiling it seems logical, but in reality you are making it easier for it to slip and make the squeal noise. I would replace the belt, and clean off the pulleys with a clean dry rag the best you can to remove any traces of oil. There is also a product called 'belt dressing' that helps the belt grip better. I would not use this on the belt with oil though, I think you should replace it.