How To Select Above Ground Pool Pumps

Written by:  Danny Rhodehamel

One of the advantages of above ground pools is that the pumps and filters are sold as one unit. These pump/filter systems are usually attached to a single base and are much more economical than an individual pump and filter. Here we'll cover the basics of both pumps and filters for above ground pools. Click for more Above Ground Pools

Tips & Warnings


Things You'll Need

Step by Step

Step 1

The necessary size (or horsepower) of the pump can be determined by the following general rule - for above ground pools up to 24 ft round, use a 1 HP pump and for above ground pools over 24 ft round, use a 1.5 HP pump. That was easy, wasn't it? Many pool owners tend to think, "the more horsepower the better". Actually what’s best is to get the proper horsepower for your pool. Too much power and the water will be pushed through the filter too quickly for proper sanitization. Also, you will use more energy to run at a higher horsepower. Most manufacturers do not go higher than 1.5 HP for above ground pool pumps because it's unnecessary.

Step 2

For above ground pool pump and filter systems, the manufacturer will pair the proper horse power pump with the proper size filter. So all you really need to do is measure your pool and follow the rule above. That will guide you to the correct size pump. Now if you are replacing an existing pump and not the filter, you will need to make sure you get a pump designed for above ground pools. Above ground pool pumps are usually postioned below the water line (i.e. on the ground next to your pool). Because they have to force water upward, pumps for above ground pools are designed differently than those used for in-ground pools (where the pump is typically above the water line of the pool). When replacing a pump for an above ground pool, just make sure you purchase one that is categorized as an "above ground" pump. Most of the time, you will see pumps divided into two categories, above ground and in-ground.

Step 3

Most above ground pools currently in use have single speed pumps which run at one speed at all times. In response to growing energy costs and environmental concerns, manufacturers have begun making dual speed pool pumps which have low and high speed settings. These two settings allow you to run the pump at a lower speed for basic pool circulation and then switch to the higher speed when additional power is needed for water features, backwashing a filter, vacuuming the pool or any other application that requires more power. Dual speed pumps offer significant energy savings and are now required by law in some areas, the entire state of California being one of them. Another advantage is that the low speed setting of a dual speed pump operates more quietly than a single speed pump.

Step 4

If you are purchasing a pump and filter system and you've already determined the correct pump horse power based on pool size, your next decision will be the filter. You'll have a choice of three filter types: sand, cartridge and D.E. We'll outline the benefits and disadvantages of each.

Step 5

The oldest and most common method of above ground pool filtration is sand. Sand filters use special filter sand, normally .45 to .55 mm (also known as pool-grade silica sand), which you can usually find at home improvement stores like Home Depot. This sand has sharp edges that serve to separate particles, allowing filtration to take place. Sand filters are the least expensive of the three filter types which make them very popular however they only filter particles 20 to 40 microns in size. This means that particles smaller than 20 microns are not filtered by sand. Sand filters definitely provide adequate filtration for above ground pools but the other two types offer better sanitization. For maintenance, sand filters must be backwashed periodically.

Step 6

Cartridge filtration has been available for a relatively long time, and recently has begun to enjoy rapid growth and acceptance. This type of filter holds one or multiple cartridges inside the filter tank. These cartridges are pleated, with a paper-like look and feel. The actual material is usually comprised of polyester fibers. The pleats increase the filtration surface area. You will see cartridge filters rated by square footage; this refers to the total area provided by all of the pleats in the cartridge. When water passes through a cartridge filter, debris catches on the surface of the cartridge element. When clean, the cartridge will trap larger particles, with finer particles being filtered out as the pores become clogged by the larger debris. Cartridge filters will trap particles 10 to 20 microns in size. The cartridge element can be removed and cleaned by pressure washing inside and out with a garden hose. This easy maintenance is the most popular feature of cartridge filters. The disadvantage is that the replacement of cartridges is more expensive than sand or D.E. Generic versions of the original manufacturers’ cartridges are available for many models and will save you some money.

Step 7

As the cartridge collects particles from the water passing through, the build-up of debris and dirt will cause the flow of water to decrease. In turn, the gauge pressure will rise. When the pressure rises 7-10 psi above the starting pressure, or when flow decreases below desired rate, it is time to clean or replace the filter cartridges. If cleaned regularly, the cartridges should last one to two pool seasons depending on pool usage.

Step 8

Many pool professionals consider filtration by diatomaceous earth (also known as D.E.) to be the finest because it is capable of removing smaller particles than either sand or cartridge. D.E. is a powder comprised of the fossilized remains of diatoms, a type of hard-shelled algae. The individual grains of powder have microscopic openings which look like tiny sponges when magnified (see photo). Water can pass through these openings but particles as small as 1 to 3 microns are trapped during the first pass through the media. All D.E. filters have internal elements called grids that are coated with D.E. powder. It is this “filter cake” that strains dirt, dust, algae and some forms of bacteria from the water. Like sand filters, when a D.E. filter becomes dirty, it is cleaned either by backwashing the clogged D.E. to the “waste” line or regenerating and draining. To restore filtration, a fresh “charge” of D.E. is added to the filter. D.E. powder is fairly inexpensive so the main drawback to this type of filter is the maintenance.

Step 9

We recommend thoroughly cleaning the D.E. grid elements (pictured at left) at least once a year. Remove the grids according to the instructions in your owner's manual and hose them off with a forceful stream of water from a garden hose. Fill a large plastic container with warm water and add about a 1/2 cup of automatic dishwasher detergent. Soak the grids in this solution for about 3 - 4 hours. After soaking, rinse off the elements again before replacing them inside the filter.

Step 10

To wrap it up, sand filters are the most economical option but require periodic backwashing. Cartridge and D.E. filters are more expensive than sand but offer better filtration. Of these two, the cartridge will be the easiest to maintain but more costly when it comes to replacing the cartridges. As an above ground pool owner, you will have to decide if you want to spend more time or more money on filtration.

Comments (1 to 40 of 316)

Add Comment

User: Inyopools

Susan - We don't handle Coleman pools, but from the online pictures, it looks like what you are calling the pump is one integrated filter and pump unit. I don't know if you can separate the filter and pump and just use the filter with a new pump. The smallest pump / filter pump set we sell is Waterway's TWM-30 System 16" Sand 1/2" HP, with Trap. It would be a much better unit than what you currently have, but it cost more than you originally paid for the pool. I’d check with Coleman to see what their pump/filter price is and see if that have one a little bit bigger.

User: Inyopools

Logston - The size of your filter depends on the size of your pump. For a 1 HP pump, I would suggest an 18" sand filter like the Hayward Sand Filter with Top Mount Valve 18" Tank - S180T. For a 1 1/2 HP pump, I would suggest the next size up like the Hayward Sand Filter W/Top Mount Valve 20" Tank - S210T.

User: Susan

I have an coleman 14ft pool round and the pump we got quit working, I was wondering what pump should we get?

User: Logston

I have 24 above ground pool. I want a sand filter and don't know what size to get. Please help. Thanks

User: Inyopools

vickie - I would recommend a 1 1/2 HP pump with a medium/large sand filter for your 18,000 gallon pool. Our Jacuzzi Laser 22.5" Sand Filter W/ 1.5 HP Pump is currently on sale.

User: vickie

putting in 18x33 above ground pool what would be best filtration system and how big

User: Inyopools

Bobvan - Check the standpipe, that the laterals go into, for cracks. Also, some of the standpipes have O-rings at the top. Check the parts list for your filter and see if you have one and that it is not damaged. Then check the spider gasket in your multiport valve. If it is damaged, it would let waste water and sand go back into the pool.

User: Inyopools

I would recommend a 3/4 HP pump for your size pool. Take a look at the new Pureline 3/4 Hp Above Ground Pool Pump. It is built with the same quality as an AG Hayward pump for a much better price. For an SCG, I would recommend the Crystal Pure Salt System 20,000 gallons. It operates like the Hayward Aqua Rite SCG at a much-reduced price. You will also have to buy piping, flex or rigid, to connect these units together.

User: Bobvan

I have an 18 foot above ground pool with a 1 horsepower pump and 16 inch radiant water sand filter with silica. every time I bckwash I lose at least 10 pounds of sand. is my pump too strong. I have taken the sand filter apart and the laterals are in good shape pointing the correct direction any suggestions

User: babygrl5525

I just got an 18 ft above ground pool from someone today but they don't have a pump, what size pump do I get for a pool that size? And also I want to get one that converts it to salt water

User: Inyopools

Sahm - I would recommend a Pentair Clean & Clear 75 Sq. Ft. 1 H.P Pump for your size AG pool.

User: Inyopools

PG - We don't have many dual speed AG pumps and I would go with a 1 1/2 HP pump for your size pool. Here's a link to a WaterWay POOL PUMP AG, HI-FLO, 1 1/2 HP, 115V, 2-SPEED, 6' NEMA CORD. I would buy the larger cartridge filter.

User: Inyopools

Tammy - I would recommend a 1.5 HP pump with the larger cartridge filter for your size pool. Take a look at the new Pureline 1.5 Hp Above Ground Pool Pump. It is built with the same quality as an AG Hayward pump for a much better price. For an SCG, I would recommend the Crystal Pure Salt System 20,000 gallons. It operates like the Hayward Aqua Rite SCG at a much-reduced price. You will also have to buy piping, flex or rigid, to connect these units together

User: Sahm

I have a 22'round AG pool and am looking for a new pump for it. As our pumpkins that it came with quite. I want a cartridge filter that is the most low maintenance and that is what I'm used to. What would u recommend?

User: Inyopools

TPais1007 - Your pool size is just under 13,000 gallons. I would recommend a PureLine Pure Pro XL 1 HP pump for this AG pool. Note that this pump only works on 115V.

User: PG

hi, I need filter/pump combo for 15x30 AG pool. I want a dual speed pump, is 1 hp which will run at 1/2 hp on low strong enough for this pool? is 100SQft cartridge filter good or should I go with 150sqft? I want the filter a little bigger than minimum recommended but don't want too big. thanks

User: TPais1007

I need to replace a pump for my above ground pool it is 27 X 16 4 feet deep what would you recommend?

User: Tammy

Hi! I have a 16x32 intex ag pool. The pump no longer works so I want to replace it. I have been using the sand filter but have not had very good results with it so I want to purchase a new cartridge filter. My pool holds a little over 15,000 gals. I have been researching pumps and want to go with Hayward model. Will that brand work with a intex pool? I also want to use saltwater so what should I purchase for my pool? I'm looking at the Hayward sp1593 pump and also their large cartridge filter. What else should I purchase in order to use saltwater? What's your thoughts on my choice of pump and filter for the pool?
Thank you,

User: Inyopools

reecespieces5 - If your pool is in-ground and your water feature is elevated or pushing water, you will need a small in-ground pump like the Hayward Super Pump 1/2 HP Single Speed Swimming Pool Pump with a Hayward Star Clear Filter 25 Sq Ft 1-1/2" Ports. For an above ground pool, where the pump is installed below the water line, you could use a 25 Sq Ft Cartridge Filter System w/ 40 GPM Pump.

User: Inyopools

mlopez1 - I would recommend the Hayward EC40C Perflex Filter W/ 1 HP Matrix Pump set for you size pool.

User: Inyopools

7500 gal AG pool - Yes that is the size pump and filter we would recommend.

User: reecespieces5

We have a very small, ~400gal. 8x12 pool/water feature. What pump and filter system would you recommend? We would like to use the cartridge filter type. Thank you.

User: mlopez1

I currently have an above ground pool 24*52 and am looking for a new pump and D.E. filter. What are your recommendations.


i have a 7500 gal round pool and i need a new pump and filter. is a 19 in filter and 1HP motor big enough?

User: Inyopools

Mike - I would recommend The Perflex DE Filter 20 Sq. Ft for your size AG pool. If you are considering replacing both the pump and filter, I would recommend the Hayward EC40C Perflex Filter W/ 1 HP Matrix Pump set.

User: Mke

I have a 24' round intex pool that has cartridge filter. What DE filter would you reccommend?

User: Inyopools

Jessica - For your 18' Round Above Ground pool, i would suggest a Skid Pak Clean & Clear 75 Sq. Ft. 1 H.P Pump. Pentair is a great company and this is a good price for a reliable pump and filter set.

User: Jessica

Hello, I have an 18x48 pool. We are needing a new pump an filter system this year. What would you recommend? And I would really like to stay away from sand filters!! Thank you!!

User: Inyopools

Tiny/Delis -For a 18'x52" above ground pool, I would recommend a Hayward Pump & Filter S166T Filter w/ 1 HP Matrix Pump & Timer combination. Your comment just asked for information on a pump. AG pumps are usually sold as a set with the filter. If you weren't looking for the set, just buy the 1HP Matrix pump. Also this combination includes a timer to automatically set the time to run the pump each day. If you don't want that, we sell the set without the timer for ~$30 less. You had also asked for information on AG pool solar heaters. Here is our link to "Solar Heaters".

User: Tiny

Hello, and thanks for your post. I'm planning to buy an Intex above ground pool (18 × 52) for a single mother of 7 children. One of her children battled cancer 5 years ago and the cancer came back. The little girl is 10 now and I asked her what would be something she would like and she told me me a pool for her yard this summer. I'm planning to get the Intex brand because it's what I can afford at this time. From previous experience I had an Intex pool before and the pump it came with it was horrible. Can you please help and tell me what would be the best pump and solar for a very high traffic in the pool and not to mention the debris of crab grass and trees. Please tell me ASAP. I would appreciate it before I make a purchase.

User: Inyopools

Greg - This is the VS pump that we are recommending for above ground pools.

User: Greg

Thanks for the quick response. I am running new wires so I could do 120 or 240. Would you recommend a different pump since I can do either?

User: Inyopools

Greg - If you are using 115V for supply power, we would recommend the Hayward Super Pump VS Variable Speed Pump (115V). You should recoup your higher initial purchase cost in just over a year with reduced operational costs.

User: Greg

I am building a pump/filter system for a new 24 foot above ground pool. We are looking into Solar as well. Everything I read about solar seems to point towards getting a vari speed pump. But then I'm looking at having to buy a separate filter and its around $1200 just for the filter and pump. I don't mind if it will save money in the long run but is this the best way to go?

User: Inyopools

Dustin - We usually recommend a 1 HP pump for AG pools that are 24' or below in diameter. If you are considering adding a small solar heater, you could stay with 1 HP. With larger solar heater or arrays of heaters, you should consider a 1 1/2 HP pump. For a cartridge filter/pump set, I would recommend something like a Pentair 1 HP OptiFlo Pump Twist Lock Cord W/ 75 Sq. Ft. Clean & Clear Cartridge Filter. This set has the more common twist lock plug. We also sell a set with a standard plug.

User: Dustin

I am rebuilding a King George 24' above ground pool that collapsed this summer. 52" height. The original pump/filter was 1.5 hp sand filter. I am just starting my search but I think I would like a cartridge filter. Is 1 hp enough? Any advice on make, model and size?
If I added a solar heater do I need to bump up to a 1.5 hp?

Thank you.

User: Inyopools

Liz - For your size pool I would recommend a Jacuzzi Laser 19" Sand Filter W/ 1 HP Pump. It's a very good set and we have them on clearance currently.

User: Liz

I purchased an Intex 22x52 round pool this summer and the pump(Krystal clear Model 633T filter pump) does not seem to be adequate for this size pool, was wonder if you could recommend a pump/filtration system for me.

User: Inyopools

HappyTrainFan - For a 20' round 52" deep AG pool I would recommend a S180T Hayward sand filter.

User: HappyTrainFan

Hello, I have a 24x52 foot above ground pool. I have not had any luck with a cartridge filter system. My question is I have a Hayward 1.5 HP pump but need to buy a sand filter. What Hayward filter size would you recommend to buy?

  1     2     3     4     5     6     7     8    

Back To Top

Tips & Warnings

If you want to get a cartridge filter, make sure generic cartridges are available for it before you buy. This will save you money in the future.

Don't undersize your pump and filter to save a few bucks. For proper sanitization and your family's health, make sure you get the proper horse power for your pool size.

Please Note:

Inyo Pool Products is not responsible for any injury or damaged equipment
while using our guides. Using our guides is doing so at your own risk.
These guides are suggested use of your pool or spa equipment and may vary
depending on which product you are using.