Best Above-Ground Pool Filter 2026 - Sand and Cartridge Reviewed

What Filter Is Best for an Above-Ground Pool?

The best above-ground pool filter is the Hayward S244T Pro Series sand filter, a 24-inch tank rated to 48 GPM that handles pools up to 24,000 gallons. It covers nearly every above-ground pool size sold in the residential market, uses a 7-position multiport valve with a Waste setting for vacuuming algae straight out of the pool, and lasts 15 to 20 years with replacement parts stocked at every pool supply retailer. It is sold as a filter only, so pair it with a 1 to 1.5 HP above-ground pump.

Above-ground pool owners have three filter types to choose from: sand, cartridge, and diatomaceous earth (DE). Sand suits most pools from 10,000 gallons upward and is the lowest-effort option week to week, because cleaning it means a 2 to 3 minute backwash rather than pulling a part out of the tank. Cartridge suits smaller pools under 10,000 gallons, tight equipment pads, and anyone paying for water, since it filters finer at 10 to 15 microns and wastes nothing on backwashing. DE filters the finest of the three at 3 to 5 microns but needs powder recharged after every clean, which is more upkeep than most above-ground owners want.

The plain recommendation: buy a sand filter sized one step above your pool volume unless your pool is under 10,000 gallons or you are on metered or well water, in which case buy a cartridge filter of 75 sq ft or more. If your pool is under 15,000 gallons and you would rather buy one box than two, the Intex Krystal Clear 28637EG combo is the cheaper route. Whichever type you pick, size it to the pool gallons rather than to the pump horsepower, because an undersized tank is the single most common reason above-ground pools go cloudy. Check the sizing table in the next section before you buy anything.

What Size Filter Does an Above-Ground Pool Need?

Size the filter to the pool volume, not to the pump that came in the box. Divide your pool gallons by 360 to get the GPM needed for a six-hour turnover (the industry standard target), then buy a filter rated at or above that number at normal operating pressure.

Pool volume formula:

• Round pool: Diameter x Diameter x Average Depth x 5.9 = gallons
• Oval pool: Length x Width x Average Depth x 6.7 = gallons

If you know your pool dimensions rather than its gallons, this table maps the common above-ground sizes to the minimum filter for each:

The bands overlap at the boundaries on purpose. If your pool lands within 1,000 gallons of a cut-off, take the larger filter: oversizing costs $50 to $100 once and saves you a backwash every week for the next 15 years, and a filter running at 80 to 90% of its rated capacity keeps clearer water and needs less frequent cleaning than one running at 100%.

Two more things to watch. First, above-ground pumps rarely hit their box-rated flow once real plumbing and a full filter are in the way, so if your pool sits at the top of a band, take the larger tank and run the pump longer rather than chasing the higher flow number. Second, a filter rated above your requirement is never a problem, while one rated below it is a permanent one. Our full method, including how to measure an irregular pool and how head loss changes the maths, is in what size pool filter do I need.

Why Bundled Above-Ground Pool Filters Are Usually Undersized

When you buy an above-ground pool kit - pool, liner, ladder, pump, and filter all in one box - the filter included is sized to the minimum specification that allows the manufacturer to claim it works with the pool. The minimum is not the same as adequate.

A common example: an 18-foot round above-ground pool holds approximately 8,000-10,000 gallons. To filter this volume in one daily turnover, you need a pump and filter capable of moving 55-70 GPM continuously for 2-3 hours, or a lower flow system running 8-12 hours per day. Many kit filters rated for these pools are 12-14 inch sand filters running at 28-35 GPM - the absolute minimum that produces technically acceptable water clarity under ideal conditions.

Ideal conditions rarely exist. Pollen season, heavy bather load (a busy weekend), a dead algae bloom being treated with shock - any of these events push a minimum-specification filter into inadequacy. The pressure rises, the filter slows, and the water gets hazy or green.

The upgrade path is straightforward: a 19-24 inch sand filter or a 75-100 sq ft cartridge filter sized properly for the actual pool volume. These cost $150-450 depending on type and brand, and they last 10-20 years. Spread over a decade, that is $15-45 per year for clear water.

Sand vs Cartridge for an Above-Ground Pool

Almost every above-ground buying decision comes down to these two types. Here is how they compare on the factors that actually cost you money and time.

Sand filter advantages:

• Lower per-cleaning maintenance - a backwash takes 2-3 minutes and requires no disassembly
• Better at handling algae - you backwash dead algae out rather than pulling and cleaning a loaded cartridge
• Multiport valve gives you a Waste position for vacuuming algae directly out of the pool without recirculating through the filter
• Sand media lasts 5-7 years before needing replacement
• Lower sensitivity to heavy debris loads - sand handles pollen, dirt, and organic matter well

Sand filter disadvantages:

• Coarser filtration: 20-40 microns vs. 10-15 for cartridge and 3-5 for DE
• Backwashing uses 150-250 gallons of pool water per cycle - adds up on wells or metered water
• Requires 100-200 lbs of silica sand to fill the tank - heavy to set up initially

Cartridge filter advantages:

• Finer filtration (10-15 microns) - clearer water with fine particles like pollen and fine dust
• No backwashing - all water stays in the pool
• Simpler operation - no multiport valve, fewer positions to set correctly
• Smaller footprint - cartridge filters are more compact than equivalent-sized sand filters

Cartridge filter disadvantages:

• Cartridge element must be removed and spray-cleaned every 4-8 weeks
• Element replacement every 1-3 years ($30-120 per element depending on size)
• Less effective during active algae - a loaded cartridge during an algae bloom must be removed and cleaned rather than simply backwashed

The verdict. For most above-ground pools, sand wins on effort and cartridge wins on water. If your pool is over 10,000 gallons, sits under trees, or gets a busy weekend crowd, take the sand filter: recovering from an algae bloom or a pollen drop is a backwash instead of a 20 minute cleaning session, and that difference decides whether the filter actually gets maintained. If your pool is small, your water is metered or drawn from a well, or you simply want the clearest water you can get without powder, take a cartridge of 75 sq ft or more. Cartridge filters reward owners who stay on top of maintenance schedules and live in areas with low pollen and moderate bather loads. Ten-year running costs land close enough that the choice should come down to which chore you will keep up with, not which one is cheaper.

There is a third option most above-ground owners never consider: DE filtration. It is rarely bundled but produces the clearest water of the three, and running a DE filter on an above-ground pool covers when it makes sense.

Cartridge Filters for Above-Ground Pools

Cartridge is the right call for a large share of above-ground pools, particularly the 12 to 18 foot round sizes where a full sand tank would cost more than the pool package. A cartridge filter traps particles down to 10 to 15 microns against a pleated element, so it catches fine pollen and dust that passes straight through a sand bed at 20 to 40 microns. There is no multiport valve to set wrong, no 200 lbs of sand to haul, and no water dumped to waste. The trade is that cleaning means shutting the pump down, opening the housing, pulling the element, and rinsing the pleats, which takes about 20 minutes every 4 to 8 weeks in season. Cartridge sizing follows the same rule as sand: match the element area to the pool volume, and do not go below 75 sq ft on a pool over 10,000 gallons.

The two costs that catch people out are element replacement and cleaning frequency. A pleated element does not last forever even when it is rinsed properly, because the fibres relax and the pleats lose their grip on fine particles. Budget $30 to $120 for a replacement every 1 to 3 years, and buy the element for your exact housing rather than a generic that only approximately fits. For the full breakdown of cartridge types, element codes and running costs on above-ground systems, see above-ground pool cartridge filters, and for the replacement schedule see how often to replace an above-ground pool filter cartridge.

Product Rankings

1. Hayward S244T Pro Series Sand Filter - Best Overall

The Hayward S244T is a 24-inch sand filter tank with an integrated 7-position multiport valve (Filter, Backwash, Rinse, Waste, Recirculate, Winter, Closed). The 24-inch tank holds 200 lbs of number 20 silica sand and is rated for pools up to 24,000 gallons - covering nearly every above-ground pool sold in the residential market.

Hayward is the most widely distributed pool equipment brand in North America. Their Pro Series sand filter line has been manufactured with minimal design changes for decades, which means replacement parts, O-rings, and multiport valve components are universally available from any pool supply retailer or online.

The S244T requires a compatible 1-1.5 HP pump. Pair it with the Hayward SP1580X15 Power-Flo LX pump or the Hayward SP0621C Power-Flo II for a complete above-ground pool filtration system. The filter and pump connect via standard 1.5-inch plumbing fittings.

Setup requires filling the tank with 200 lbs of number 20 silica sand, which you can buy at pool supply stores for $30-50 total. See our guide on how much sand for pool filter for exact quantities by filter size.

Specs: 24-inch tank, rated to 48 GPM, handles up to 24,000-gallon pools, 7-position multiport valve
Pros: Handles virtually any above-ground pool; widely available parts; 15-20 year lifespan; 7-position multiport valve
Cons: Pump not included; requires 200 lbs of sand; backwash process requires learning the multiport positions

Buy the Hayward S244T on Amazon - ~$300-450

2. Intex Krystal Clear 28637EG Sand Filter Pump - Best Combo for Basic Above-Ground Pools

The Intex Krystal Clear 28637EG is a self-contained sand filter and pump combo designed specifically for above-ground pools up to 15,000 gallons. It is one of the few quality combo units that bundles a genuinely adequate pump with the filter rather than the bare-minimum motor found in most kit combos.

The 28637EG runs at 2,100 GPH (35 GPM) and uses the standard backwash and rinse operation. For an 18-foot round pool at 7,600 gallons, this turns the water over in approximately 3.6 hours - excellent. For a larger 21-foot round at 10,400 gallons, it handles the volume in about 5 hours, which is still within acceptable daily turnover parameters.

The Intex combo is the right choice for above-ground pool owners who want a single-purchase solution that fits pools up to 15,000 gallons without needing to pair a separate pump. For pools over 15,000 gallons, step up to the Hayward S244T with a separate pump.

Specs: 12-inch tank, 2,100 GPH / 35 GPM, handles pools up to 15,000 gallons, 6-position valve
Pros: All-in-one purchase; sized for most mid-range above-ground pools; easy installation
Cons: Not suitable for pools over 15,000 gallons; pump quality lower than standalone Hayward/Pentair pumps; shorter service lifespan than commercial-grade systems

Buy the Intex 28637EG on Amazon - ~$200-280

3. Pentair Triton II TR40 - Best Premium Sand Filter

The Pentair Triton II TR40 is a 19-inch commercial-grade sand filter that is often used on above-ground pools where the owner wants Pentair system compatibility (Pentair pumps, automation, IntelliTouch controllers). The TR40 is slightly smaller than the Hayward S244T (19-inch vs. 24-inch tank) but built to the same commercial durability standard.

The Triton II uses a top-mount 7-position multiport valve and holds 150 lbs of sand. Rated flow is 40 GPM - appropriate for pools up to 16,000 gallons. For larger above-ground pools, Pentair offers the Triton II TR100 (24-inch equivalent).

Specs: 19-inch tank, 40 GPM, pools up to 16,000 gallons, 150 lbs sand capacity
Pros: Commercial-grade Pentair build quality; excellent for Pentair system integration; durable top-mount valve
Cons: Smaller capacity than Hayward S244T; more expensive per gallon-handled; pump not included

Buy the Pentair Triton II TR40 on Amazon - ~$350-500

4. Hayward C4001575XES EasyClear Cartridge Filter - Best Cartridge Option

The Hayward EasyClear C4001575XES is a 400 sq ft cartridge filter with an integrated 1.5 HP pump, designed as an all-in-one cartridge filtration system for above-ground pools up to 20,000 gallons. It is the best cartridge option on this list because the C-Series EasyClear filters at 10-15 microns, requires no backwashing, and uses Hayward’s standard C-series filter elements that are widely available for replacement.

The EasyClear’s built-in pump runs at 60 GPM - enough for pools up to 20,000 gallons in a comfortable daily turnover. The cartridge element is a standard Hayward C4000 series element available from any pool supply retailer for $30-50 depending on where you buy.

Specs: 400 sq ft cartridge area, integrated 1.5 HP pump, 60 GPM, handles pools up to 20,000 gallons
Pros: All-in-one with quality pump; fine 10-15 micron filtration; no backwash water loss; widely available replacement elements
Cons: Cartridge must be removed and spray-cleaned every 4-8 weeks; element cost every 1-3 years; not ideal during algae treatment

Buy the Hayward EasyClear on Amazon - ~$350-500

5. Hydrotools by Swimline 60 SQ FT Cartridge Filter - Best Budget Cartridge

The Hydrotools 60 sq ft cartridge filter is the best budget-priced cartridge option for small above-ground pools up to 8,000 gallons. It is a filter-only unit (no pump included) that fits standard 1.5-inch plumbing connections and uses a replaceable type-D or equivalent filter element.

Build quality is lower than Hayward or Pentair, and the 60 sq ft element is marginal for anything over 7,000-8,000 gallons. But for an Intex 12-15 foot pool with an existing pump, the Hydrotools stand-alone filter is a legitimate upgrade over the stock kit filter at a reasonable price.

Specs: 60 sq ft cartridge, flow rate approximately 25 GPM, pools up to 8,000 gallons
Pros: Lowest price on the list; compatible with most 1.5-inch above-ground pump connections; replacement elements widely available
Cons: Only appropriate for smaller pools under 8,000 gallons; lower build quality than name brands; pump not included

Buy the Hydrotools Cartridge Filter on Amazon - ~$80-120

Above-Ground Pool Filter Installation Notes

Plumbing connections. Most above-ground pool filters use 1.5-inch diameter fittings. Your pump and filter must use the same connection size. Check the filter and pump specifications before purchasing.

Pad and level placement. Set the filter on a flat, level pad - concrete pavers, a plastic equipment pad, or compacted gravel. An unlevel sand filter can put stress on the tank neck and multiport valve connections, causing leaks. Intex combo units can sit directly on the ground since they are designed for above-ground pool portability.

Sand loading for new sand filters. Fill the tank with water halfway before adding sand - this cushions the laterals at the bottom of the tank during filling and prevents cracking. Add sand slowly, in sections, and reassemble the multiport valve before backwashing. See our guide on how to change pool filter sand for a full walkthrough.

Priming the pump. Above-ground pool pumps are typically self-priming but need the housing to be filled with water before first start. Fill the pump housing through the strainer basket lid, replace the lid, then turn on the pump. It may take 30-60 seconds to fully prime and reach full flow. If the pump will not catch, our guide on how to prime a pool pump covers the fixes.

Above-Ground Pool Filter Buying Mistakes

1. Keeping the bundled filter because it came with the pool. The filter in a pool kit is specified to the legal minimum, not to a comfortable turnover. If your pool is over 8,000 gallons, the kit filter is almost certainly the weakest part of the package and the first thing you should replace. At the other extreme, if your pool holds only a few hundred gallons, a filter may be optional altogether: keeping a small pool clean without a filter covers that case.

2. Matching the filter to the pump instead of the pool volume. People read the pump box, see 1.5 HP, and buy a filter labelled for 1.5 HP pumps. Horsepower is not a filtration rating. Calculate gallons, divide by 360, and buy a filter rated at or above that GPM figure. A big pump pushing water through a small tank just channels it past the media faster and filters less.

3. Ignoring the 1.5-inch versus 1.25-inch fitting mismatch. Most Intex and other soft-side pool systems run 1.25-inch hoses, while Hayward, Pentair, and other rigid-plumbing filters use 1.5-inch fittings. The two do not connect without an adapter. Confirm the fitting size on both the pump and the filter before ordering, and budget $10 to $20 for adapters if they differ.

4. Undersizing to save $40 and then backwashing daily. The price gap between a 19-inch and a 24-inch sand tank is often $40 to $80. The smaller tank on a 16,000-gallon pool climbs 10 psi within days of a pollen drop or a busy weekend, so you backwash constantly, dump 150 to 250 gallons of chemically balanced water each time, and refill and rebalance it. The $40 saving is gone in one season of water and chemicals.

5. Forgetting that sand costs money on top of the tank. A 24-inch sand filter is sold empty. Filling it takes 200 lbs of number 20 silica sand at $30 to $50, and you will do it again every 5 to 7 years. Add that to the sticker price when you compare a sand filter against a cartridge unit, and add the $30 to $120 element replacement on the cartridge side to keep the comparison honest.

Related Guides

• Best Sand Filter for Above-Ground Pools - the sand-only rankings in more depth
• Best Above-Ground Pool Pump and Filter Combo - complete systems if you need the pump too
• Above-Ground Pool Cartridge Filters - cartridge types decoded and running costs
• How to Set Up an Above-Ground Pool Filter - installation walkthrough
• How Much Sand for an Intex Sand Filter - sand amounts by Intex model