When Do You Know It's Time To Replace The Sand In The Filters?

by Jonathan

This week I have noticed while hoovering the swimming pool there is alot of sand at the bottom of the pool (this has never happened before).

I checked the sand when I got out of the pool and it happens to be the course sand from the filters.

The pool filters are a little over 3 years in operation.

I'm wondering would it be time to replace the sand in the filters or replace the filters?

Thanks for the question Jonathan

There are several reasons why you could be getting sand in the bottom of the pool.

Normally sand gets put back into the pool through the returns.

Here are some good posts about this issue:

Sand In Pool After Changing The Filter

Do I Have Sand Filter Or Pump Problems?

Change The Sand In Above Ground Pool Sand Filters

These next two are very good:

Why Is Sand Going Back Into The Pool After Backwashing?

How Do I Stop Sand Going Back Into The Pool..Pool Keeps Getting Dirty..

The above posts talk about (and go into great detail) the most common reasons for sand going back into the pool:

1. Broken lateral and/or diffuser

2. Channeling

3. New sand

4. Old sand

5. Not doing the RINSE after back washing

Sand, with good maintenance, can normally last anywhere from 5 - 10 years.

Before you change your sand or spend money on a new filter, look over the posts above.

If you have any additional questions or would like to comment on your post, you can find it on the Q&A page in the "Sand Filter" category:

Swimming Pool Questions and Answers

Hope this helps and have a fun and safe Summer.


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Connecting Hose To Sparco Pool Sand Filter

I need to know where to connect the inlet and outlet hoses to the sand filter.

I do not have manual. It's hooked up but I'm not getting water back into pool from the eye ball.

Thanks for the question

Normally with a Sparco the inlet hose comes from the top of the pool pump into the port next to the Multiport valve.

Then the other port is the outlet hose which sits in front of the Multiport valve housing.

I have several pdf files and manuals that I've collected from over the years of doing pools. I don't have the manual for a Sparco, but I do have a pdf file.

Here's the one I have for a Sparco sand filter:


Hopefully this will work for you.

To post a reply, or if you have a similar question, you can see your post (Connecting Hose To Sparco Pool Sand Filter) on the Q&A page in the "Sand Filter" category.

Swimming Pool Questions and Answers

Check back to this post for answers.

Hope this helps and have a great Summer.


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Sand Filter - High Pressure

by Simon
(United Kingdom)

Recently,when the pump is set to either backwash or filter, the pressure builds up and the clear plastic top of the sand filter blows off! I assume that this is most likely due to a blocked sand filter, though I have backwashed fairly regularly.

Would the best solution be to replace the sand in the filter? We have been at the house for two years and the sand doesn't appear to have been replaced for a while... Doesn't appear greasy, but does seem pretty dirty when the top is off the filter.

The clear plastic housing and the thread on the sand filter seems in good nick, but the pressure is obviously too great for the top to stay in place!

Can you help?

Thanks for the question Simon

Sorry for the delay. We've been replacing all the floors in our house and have just now been able to put things back, including the computer.

Here are some posts that can help you:

Why Does Air Pressure Build Up Inside My Sand Filter?

High Pressure Problem On A Swimming Pool Sand Filter

If the sand has not been changed in the pool for at least 5 years, now would probably be a good time to change it out. When the tank is empty, check the laterals to be sure none are broken. If they are, replace them.

The first 1 - 2 inches of the sand does 99% of the filtering. If that's clogged up, a good backwash is recommended. If that doesn't clear it, check the impeller for debris. You can also go the degeasing route as well. A good one is GLB Filter Fresh. I've used it several times for the YMCA sand filter and it works great.

If you want to degrease the filters, just email back and I can give you a step by step method that's better than what's recommended on the bottle.

Keep the skimmer and pump baskets cleaned out.

Hope this helps and let me know how it turns out for you.


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