How does a pool sand filter work?

Asked By: Ouarda Jagovenko | Last Updated: 28th April, 2020
Category: pets fish and aquariums
4.5/5 (16 Views . 43 Votes)
Sand filters work by allowing water to cycle through a canister that contains sand. The water flows through the sand with ease, but larger particles are unable to pass through. Once the debris and other particles have been filtered out by the sand, a pump moves the clean water back into the pool.

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Also to know is, do you use chlorine with a sand filter?

Yes, you can use this sand filter pump if you add chlorine or other chemicals to the water.

Beside above, why use a sand filter in a pool? Sand Filters They filter particles that range from 20-40 microns. Sand filters use sand to filter dirt and organisms from your pool water. Once the debris is at capacity or full, the pressure inside the filter increases. After backwashing your pool, you might find yourself rebalancing and refilling your pool.

In this way, how long do pool sand filters last?

5-7 years

How often should you backwash a sand filter?

As a rule of thumb, you should backwash and rinse your filter about once a week. The optimal time is right after you vacuum the pool. However, if your pool has had a lot more use than normal, it may be necessary to backwash twice a week.

37 Related Question Answers Found

Can you put shock and chlorine in a pool at the same time?

You do need to use both tabs and shock. Without tabs, the chlorine shock will dissipate quickly out of the water; without shock, the chlorine level will not get high enough to fully sanitize the water. You should aim to keep the chlorine level at between 1 and 3 ppm.

How do I know if my sand filter is bad?

How to Tell If Your Sand Filter Is Bad: 7 Common Pool Filter
  1. A Slow Sand Filter. If your swimming pool begins to seem a bit cloudy or unclear, then you may have a sand filter that's running slowly.
  2. Leaking Multiport Valves.
  3. Broken or Bad Laterals.
  4. Dirty Sand Filter.
  5. Valve Failure.
  6. Tank Failure.
  7. Pressure Issues.

Can you use bleach to shock a pool?

Using Bleach as a Shock
You need to use less of such products per volume than you do if you simply add chlorine, and if you opt for chlorine alone, you need more bleach than you do pool chlorine. Bleach contains the same chemical -- sodium hypochlorite -- as pool chlorine, but the concentrations are different.

How do you vacuum a pool with a sand filter?

How To Vacuum the Pool with a Sand Filter
  1. Remove Large Leave or Debris.
  2. Attach the Vacuum Head to the Telescopic Pole and Hose Pipe.
  3. Flood the Hose Pipe With Water.
  4. Attach the Hose Pipe to the Skimmer or Dedicated Suction Port.
  5. Vacuum the Pool.
  6. Disconnect the Hose Pipe from the Skimmer or Dedicated Suction Port.

Is a sand filter the best filter for a pool?


If you're on a budget, and you want to spend minimal time on maintenance, a sand filter is the best choice for you. It's also optimal for large pools because it won't clog as easily as other filters. Your pool pump sucks water in from the skimmers, then pushes it through a large filtration tank full of sand.

Should I run my pool pump on filter or recirculate?

The recirculate setting on a swimming pool filter is actually used to bypass the filter mechanism. Recirculate allows the water to flow out of the pool and back into it again without running through the sand or diatomaceous earth in the filtration system.

Can you put too much sand in a pool filter?

TOO MUCH SAND IN TANK - If you have too much sand in your filter tank, your backwash and rinse cycles will not be as effective. Leave at least 6" of space between the top of the sand and the top of the filter tank.

How do I clean the sand in my pool filter?

Cleaning Time!
  1. Backwash the filter for 3 to 5 minutes to remove debris.
  2. Turn off the pump, and turn the valve to Filter.
  3. Remove the pump's strainer lid.
  4. Pour sand filter cleaner.
  5. Turn the pump on for about 15 seconds, just long enough to transfer the cleaner from the pump to the filter.

What is the best filter media for a swimming pool?


The three are sand (obviously), zeolite, and glass.
  • Sand Media. Silica sand is the oldest and most trusted media for sand filters.
  • Zeolite Media. Zeolites are from volcanic rocks.
  • Recycled Glass Media. This option is not only environmentally friendly, but it actually works!

Can you backwash a pool too much?

Backwashing Your Pool Filter Too Often
Pool water washes funk and gunk out of your filter media, then exits through your filters backwash valve drain port. Backwashing is an important part of basic pool care, but overdoing it is one of the more common pool maintenance mistakes.

How do you know when your pool filter needs to be replaced?

There's a couple of signs that it's time to replace your filter. The most obvious is that your water quality is low. If your pool water has turned from blue to green, is full of dirt and debris, or isn't as clear as it should be, it's definitely time to change your filter.

How many bags of sand do I need for a pool filter?

Pour sand carefully into the pool sand filter until laterals are fully covered. For this unit 3 bags should leave at least 6" space between the top of the sand and the top of the filter.

How often should a pool filter be changed?

General Filter Life
Pool-filter cartridges can run for about 2,000 hours in a filter pump. Usually, filter cartridges have to be replaced once every one to two years. The filter, however, will not last as long if you enter the pool with suntan lotion, deodorants, hair-care products, and other chemicals.

How do you make a sand filter more efficient?


You can add DE powder to your sand filter to make it more effective. Just add 1-3 cups of DE powder when you backwash or replace your sand. Adding powder makes your sand filter 4x more effective, allowing it to filter contaminants down to 3 microns.

How do you drain an above ground pool with a sand filter?

How to Drain a Pool with a Sand Filter
  1. Turn the pump off.
  2. Roll backwash hose out into the yard or approved draining area.
  3. Rotate the multiport valve on the top or side in a clockwise direction to the “Waste” position.
  4. Turn the pump back on.

Is sand or cartridge filter better?

Cartridge Filters can screen out twice as much dirt and debris as a Sand Filter. Its larger filtration area allows the water to progress through the cartridge and remove smaller particles. Maintenance is much easier because there is no need for a back-washing step.