Sand Draining From Tank

by Paul
(Peterborough)

I was opening my pool (above ground) as I was vacuuming the pool some I noticed a small leak in the lower case housing of the pump.


Still seemed to vacuum ok but pressure seem to drop slightly! Then when I looked at where it was coming out of the hose there was a large deposit of sand!

Then when I put it on filter even more sand came out and into the pool! Any help on this would be great!




Thanks for the question Paul

Sand going back into the pool can normally be a broken lateral and/or standpipe or a bad spider gasket. This is the gasket that is found in the multiport valve (MPV).

Take note of how the filter sits in the housing because you'll replace it exactly that way.

Place the handle between the notches to loosen the tension. Doesn't matter which notches.

Remove the screws and pull straight up to remove the MPV. Scrape off the old gasket, clean the tracks, and glue the new one in place. Loctite #401 glue is good. Several dabs at the end points and in the tracks. Lube the gasket with Magic Lube, not a petro product like Vaseline.

Replace the MPV back into the housing and screw back in place in a star pattern, just like lug nuts on a tire. Remember to turn the MPV in one direction, not back and forth.

Here's a link with a picture:

Water Coming Out Backwash Hose During Filtration

For a broken lateral you're going to need to replace it. If you can scoop out sand and change a light bulb you can change a lateral.

Drain the filter. Remove all the sand either by hand or you can use a shop vac. Take the pipe out and replace the lateral. Fill the tank 3/4 with water then add the correct amount of sand back into the filter.

I would encourage you to call the manufacturer or check in the owner's manual for what is known as "freeboard". This is the measurement from the top of the sand to the top of the filter.

This way you'll have the correct amount of sand and the measurement.

When you put new sand in the filter, some will be lost due to backwashing and settling. You'll probably have some sand going back into the pool through the returns. This will decrease over time.

You may need to top off the sand later on. This is why knowing the measurement of the freeboard is important.

I hope this has answered your question to your satisfaction.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Sand Filters" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of your choice and I'll answer your questions by phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going. Thank you.









Have a great Summer.

Robert

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Zeo Sand Replacement

I just replaced my sand with Zeo sand. After my backwashes the Zeo sand gets into the pool.

I have been rinsing after backwash until clear, but still getting the new sand back in the pool.




Thanks for the question

I've found that just like sand, Zeo sand can be a bit dirty when put into the sand filter. These finer particles will go through the laterals and find their way back into the pool through the returns. The process is to keep vacuuming until the sand settles.

Be sure you filled the tank 1/2 - 3/4 with water prior to adding the Zeo sand. My understanding is it may clump together thus reducing the effectiveness of the filtration.

Honestly, Zeo wouldn't be my first choice. Nothing wrong with new things but they aren't better just because their new. Sand does a good job.

The pieces of Zeolite have very small passages through which the dirty water runs. It catches smaller particles. The problem that I've found is the individual pieces of Zeolite are relatively large compared to DE, and alot of dirty water can between the pieces of Zeolite rather than through the passages.

Be sure you have enough Zeo sand to do the job and the laterals are not broken.

I hope this has answered your question to your satisfaction.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Sand Filters" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of $29 per hour and I'll answer your questions by phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going. Thank you.









Have a great Summer.

Robert

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Convert Fabric Filter To Sand Filter

by Bader

I have an old fabric filter. The old fabrics were teared and I would like to convert it to sand filter.

Please advise

Thanks




Thanks for the question

I will give you my professional and real world opinion on what you are thinking about doing, namely, converting over to a sand filter.

I will assume when you say fabric it means a cartridge. I've heard DE filter called fabric but not as often.

I would encourage you to NOT covert over to a sand filter. If you look on my Q&A Page you will find question after question about the problems associated with sand filters. Sand, along with DE, are very troublesome and not worth the headaches or effort it takes to keep them running properly.

If I were you, I'd stick with cartridge filters. They're easy to keep clean, require little maintenance, have a better filter rate than sand filters, and there's no backwashing which means less water usage. Normal bachwash time is about 1 - 2 minutes. In that time you waste about 200 - 300 gallons of water.

It's your choice of what to do, but again, I'd stick with cartridge filters.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Cartridge Filters" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of $35 per hour and I'll answer your questions by phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going. Thank you.









Hope this helps and have a great Summer.

Robert

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Did I Damage My Sand Filter By Putting Salt In It?

I was not thinking and added salt in sand filter, and started the system up did I do any serious damage?




Thanks for the question

I've never run into that situation before so I'm going to give you an educated guess. You may want to contact your filter manufacturer for more details.

The first question I'd ask is if you filled the filter completely with sand, all 250 lbs. or so, or was it just a little bit? How long was the filter run before the mistake was discovered?

If you didn't fill the filter with water before adding the salt it may have damaged the laterals. But this wouldn't be a result of the salt. It's the pressure and direct energy placed upon the laterals that could have broken them.

Salt is very similar to sand in terms of particle size and consistency. An educated guess would be this. If you filled the filter with salt, turned it on and allowed it to run for a minute or so, then realized the mistake and turned the system off, it shouldn't have broken or ruined anything.

Scoop out as much salt as you can, check the lateral and standpipe for any cracks or breaks, and refill with the proper amount and grade of sand. You may have residual salt in the system but this will be diluted pretty quickly and shouldn't pose any threat to the system. Your system probably pushes around 30 gallons per minute and this will be more than enough to flush out the lines.

If you haven't broken the laterals or standpipe and everything seems alright inside the filter, the chances of doing any long term or expensive damage is pretty low.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Sand Filters" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of $35 per hour and I'll answer your questions by phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going. Thank you.









Hope this helps and have a great Summer.

Robert

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Return to Swimming Pool Sand Filters.

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