Question about Hayward SAND FILTER, PRO SERIES

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Sand and debris isn't being filtered out and comes back into the pool via return water

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  • 1,378 Answers

The lateral assembly in the bottom of the sand bad inside the filter is broken. You may not even see damage on it when replacing it but it is the problem. Replace the sand while you are at it. Be sure to fill the tank half-way with water before adding sand back into the filter. Also be sure to cap the top of the lateral assembly so sand doesn't get into the standpipe that inserts into the bottom of the valve.

John

Posted on May 29, 2011

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Posted on Jan 02, 2017

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4 Answers

What will happen if the stand pipe o-ring is bad?


The Hayward Pro Series Sand Filter uses an O-Ring on the stand pipe to separate water returning to the pool, after being filtered, from water coming into the filter from the pool. If this O-Ring is broken, missing or sufficiently worn, small particles of dirt and sand can by-pass the sand filter and return to the pool without being properly filtered by the sand filter.

This can be especially evident just after backwash and rinsing of the sand filter bed. During this time water flows up through the sand bed, opposite the direction in normal operation. This forces the top-most material of the sand bed to dislodge and wash out of the filter to waste. It can also force fine particles to enter through a faulty O-Ring into the pool return stand pipe. Then, when returning the filter system to normal operating mode, those fine particles enter the pool through the water return piping and collect on the bottom of the pool -- mostly small sand particles but potentially filtered debris particles that were captured on top of the sand bed.

To avoid this problem it's wise to replace this O-Ring every few years. And make sure to follow the manufacturer's recommendations regarding the amount of sand to fill when replacing sand. It's important to keep the top of the sand bed at the correct level to insure proper filtering and minimize stray particles coming back into the return water.

Aug 11, 2014 | Hayward SAND FILTER, PRO SERIES

2 Answers

How does Hayward Sand filter work


Excellent answer Robco, One slight variation of an explanation about "waste"... When in this mode, water never actually enters the filter tank, it goes in the valve from the pump, and out of the valve through the waste port.
Very similar to the "recirculate" mode, it comes from the pool with the help of the pump into the filter valve, and right back out the filter valve, without ever going into the tank, and back to the pool via the return port.

Jun 29, 2014 | Hayward SAND FILTER, PRO SERIES

1 Answer

Filter sand in pool


Greetings,
I am all in as well with the previous assistants (A. Miller) remedy to your problem.
Broken Laterals at the bottom of the filter.
There is no other way sand will enter the pool, bypassing the equipment, unless there is some kind of compromised equipment. As mentioned by A. Miller, the laterals are located at the bottom of the filter, normally about 9 of them approximately 6" long and about 1" in diameter. There are very thin cuts or kerfs in them that are smaller than a grain of #20 Silica Sand. Therefore only water (in theory - clean filtered water) will enter them after being pushed by pressure through the bed of sand to the bottom and entering the collection manifold via the lateral drain assembly.
As A. Miller mentioned, if only one lateral is broken, cracked or compromised, the pressure that is in that filter tank will definitely find that compromise and will "Push" sand right into that lateral, thru the rest of the system and into the pool terminating out the return lines and will collect normally immediately under the return lines. Normally more heavier at the nearest return line to the equipment area.

Although - Another possibility is, if the tank had more sand than required, when you "Backwash" sand could enter into a Multi-port valve (if you have one) and will enter into the return port, and when you turn the valve back to "Filter", you will see sand enter the pool.

Or, another reason could be inclusive of the problem above PLUS a deteriorated filter valve gasket, commonly referred to as a "Spider Gasket". The ports are supposed to be individually sealed and not allow water/debris/sand to pass between these ports, and this gasket keeps them individually compartmentalized.
But a compromised gasket seal could at times create a situation that may lead one to believe that a broken lateral is the culprit.

Removing sand is a chore! Taking the top cover off of the MultiPort valve is easier and a gasket relatively inexpensive.
But if your laterals are compromised, break out the ole shop vac and find that problem.
Good Luck

Apr 13, 2014 | Hayward SAND FILTER, PRO SERIES

1 Answer

Sand filter not filtering! It's been 4 weeks of


Air enters from the front of the pump, usually it is just the lid o-ring (over the pump basket) that needs to be lubed or replaced.
Sand filters do not filter fine particles very well. When vacuuming it is best to set the backwash valve to the "waste" setting. This allows the debris to bypass the filter and go directly to waste. Mind that you are removing water from the pool while on that setting.

Jul 07, 2013 | Pool & Spa

1 Answer

Why is the sand going back into the water Intex Sf15110


Your sand filter has developed a fault.
Normally water is filtered from the top of the sand filter through the sand to the bottom of the sand filter into the spoke pipes. The filtered water is collected by a pattern of spoke pipes that is connected to the collection box. These pipes only allow water to pass through to the return riser pipe to return the water to the pool via the selector valve.

This problem happened to me too, the fault was at the bottom of the sand filter, at the connection box, it had collapsed/cracked and allowed the sand entered the riser pipe to the selector valve that controls the backwashing, rinse, and filtering etc. and the sand and water is returned to the pool via this valve.

The can be repaired, it requires removing the control valve, removing the sand to get access to the riser pipe, and the collection box and spoke pipes. the the damaged collection box can be repaired.
Put back together in reverse order.

May 26, 2012 | Computers & Internet

1 Answer

I just finished cleaning my pool when I noticed debris around the area where my inground pool jets are. So I backwashed and vacuum that area. However, once in filter mode I noticed sand at the bottom of...


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.

Gary

Aug 12, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

Why does the material i vacum up come out the return??


If you are vacuuming a lot of debris or algae, you need to vacuum to waste. 1. You'll turn the equipment off, 2. You'll turn the valve to waste, 3. Turn the equipment back on, and 4. Vacuum the pool like you normally would. Only this time, the debris and dirty water goes out your backwash/waste line. You also don't have to backwash and rinse afterward because none of the debris went inside the filter.
Any time you vacuum up just a small amount of debris, you'll vacuum on filter and then backwash (30-60 seconds) and then rinse (about 30 seconds).

Jun 12, 2011 | Hayward SAND FILTER, PRO SERIES

3 Answers

Dirt comes back thriugh the return when I vacuum


if your pool is clean its not sand when we vac customers pools we put vac in pool and put vac hose over pool take a wet vac put on end of hose outside pool keep it on only long enough to get water flowing save your filter and water if you want to vac through skimmer make sure you are in filter mode good luck

Jul 16, 2009 | Hayward SAND FILTER, PRO SERIES

3 Answers

There's sand in my pool!


I have had this issue with several clients and before worrying, you might have had sand being drawn back into pool lines during winterization. this happens when you blow out lines, plug holes, but keeping it pressurized. if it keeps happening check draw fins on bottom of filter.

Mar 01, 2009 | Hayward SAND FILTER, PRO SERIES

2 Answers

Sand filter not catching little debris


Filter is being bypassed at backwash valve, due to poor spider gasket in valve, or there is a broken lateral in bottom of sand filter, causing debris to return to pool..

Feb 18, 2009 | Hayward Pro Series 18" Above Ground Pool...

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