Question about Hayward SAND FILTER, PRO SERIES
When I am run my Kreepy Krauly, sand from the filter comes back into the pool from the return lines.
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.
Posted on Apr 13, 2014
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Posted on Jan 02, 2017
SOURCE: 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.
Posted on Mar 02, 2009
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
Posted on Jul 17, 2009
Might you have a broken lateral in the bottom of your filter and what you are seeing is sand coming into the pool?
Do you backwash daily or more often? (You should) Do you have a multi-port vavle or other type?
Im thinking broken lateral. Sucking air in and of itself will not cause dirt to return to the pool.
Whats a lateral? There is a series of pipes in the bottom of the sand with small holes in them. These holes allow water to travel in and out depending on whether you are filtering or back washing ... but not sand. If you have sand, you have a broken pipe.
Open the filter and remove the sand into a bucket to inspect the laterals.
I hope this works for you.
Posted on Oct 19, 2009
This website contains a copy of the owners manual for the S180T pool filter. It should have all of the information that you need.
It is in PDF format. let me know if you have any trouble opening it.
Posted on May 24, 2010
SOURCE: Sand Leaking From Filter into
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!
Posted on Jun 16, 2011
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