Best Filter For Inground Pool: Compare Cartridge, DE and Sand

#1 · Best Overall

1. Pentair Clean & Clear Plus 420

• Weight: 74 lb
• Material Type: Crystal

Best for: Four-cartridge pool filtration.

Why it ranks #1: Its 420-square-foot filter area and four polyester cartridges offer substantial dirt capacity in a cartridge filter for inground-pool owners.

Four polyester filter cartridges provide the defining configuration of Pentair’s Clean & Clear Plus 420, enabling filtration across a large stated filter area. Its 420-square-foot area and two-inch unions make it a substantial cartridge option for pool owners checking both filtration capacity and plumbing connections.

Pentair specifies a large filter area for increased dirt capacity, so the 420-square-foot surface is tied directly to holding more collected material. Four polyester cartridges provide the filtration elements, while two-inch unions identify the connection size to plan for in the pool plumbing. A 1.5-inch drain supports winterization, and an internal air bleed is included. At 74 pounds, this is a heavy component to account for when arranging installation and service access.

Skip it if you need a pool-size figure stated in the listing; the Pentair Clean & Clear Plus EC-160340 specifies a 57,600-gallon maximum.

This fits pool owners seeking a large-area cartridge filter with four polyester elements and two-inch unions. Check the plumbing connection size and allow for the unit’s 74-pound weight when planning installation and ongoing service.

Listed on Amazon as: Pentair EC-160301 Clean & Clear Plus 420 sq. ft. Cartridge Pool Filter

#2 · Largest Filter Area

2. Rx Clear 525 Quad Cartridge

• Weight: 90 lb
• Dimensions: 45.5 x 23.5 x 23.5 in

Best for: High-area quad-cartridge filtration.

Why it ranks #2: The 525-square-foot, four-cartridge design offers the lineup’s largest stated filtration area and is designed for up to 150 GPM.

Four cartridge elements provide 525 square feet of filtration area, enabling this Rx Clear filter to capture debris across a large media surface. Its listed flow performance reaches up to 150 GPM, making it a substantial inground-pool system for buyers seeking high-flow cartridge filtration.

The quad-cartridge layout is described as increasing debris capture and extending cleaning cycles compared with standard single-element filters, which can reduce how often owners need to service cartridges. Reemay filtration media captures fine debris and particles, supporting the stated goal of clean pool water. Evenly spaced internal flow channels are intended to support strong, consistent circulation at flows up to 150 GPM. At 90 pounds and 45.5 inches long, this is a sizable unit to plan around.

Skip it if you need a lighter listed cartridge unit; the Hayward StarClear Plus W3C12002 weighs 30 pounds and uses one cartridge element.

This is for inground-pool owners prioritizing a large filtration area, fine-particle capture, and the stated high-flow capability. Its 90-pound weight and 45.5-inch length make access and installation space important considerations.

Listed on Amazon as: Rx Clear 525 Sq Ft Quad Cartridge Pool Filter for Swimming Pools

#3 · Large Pool Capacity

3. Pentair Clean & Clear Plus 320

• Weight: 65.9 lb
• Dimensions: 45"L x 28"W x 28"H
• Material Type: Fiberglass

Best for: Large-pool cartridge system.

Why it ranks #3: This cartridge filter is listed for inground pools up to 57,600 gallons and includes a tank and pressure gauge.

A stated maximum pool size of 57,600 gallons sets the Pentair Clean & Clear Plus 320 apart, enabling owners to assess it against a specific pool-capacity figure. Its 320-square-foot cartridge filter is listed for inground pools and includes a tank and pressure gauge.

The easily accessible removable filter cartridge supports the stated quick, convenient cleaning workflow, while the fiberglass-reinforced polypropylene tank provides the listed rugged housing construction. A unique high-flow manual air relief valve and continuous internal air relief work together to eliminate air, according to the product description. The included pressure gauge offers a reading point, but pump-to-filter fittings are not included. At 45 by 28 by 28 inches, this unit requires careful space planning.

Skip it if you need pump-to-filter fittings supplied; the Pentair Clean & Clear Plus EC-160301 lists two-inch unions among its features.

This fits an inground-pool owner seeking a cartridge system with a stated 57,600-gallon maximum and accessible cartridge cleaning. The large 45-by-28-by-28-inch dimensions and separately sourced pump-to-filter fittings are important planning boundaries.

Listed on Amazon as: Pentair EC-160340 Clean & Clear Plus 320 sq. ft. Cartridge Pool Filter

#4 · Single-Cartridge Pick

4. Hayward StarClear Plus

• Weight: 30 lb
• Dimensions: 13.8 x 13.8 x 37.7 in

Best for: Simple-service cartridge filter.

Why it ranks #4: Designed for inground pools, its 120-square-foot single-element cartridge and glass-reinforced copolymer construction suit buyers wanting a simpler cartridge setup.

A single-knob filter-head fastener replaces clamps or bolts, enabling access to the Hayward StarClear Plus tank through a simpler securing arrangement. Its extra-large, single-element cartridge and stated inground-pool focus make it a clear option for buyers prioritizing cartridge filtration and straightforward head removal.

Hayward’s extra-large single cartridge is described as supporting additional durability and maximum water flow, while the single-knob design secures the head without clamps or bolts. That combination may simplify opening the filter for cleaning compared with a multi-fastener arrangement. A single-piece injection-molded base and body provide a corrosion-free construction claim, and glass-reinforced copolymer construction is also specified. The 13.8-by-13.8-by-37.7-inch dimensions help owners assess installation space.

Skip it if you need multiple cartridges and a larger stated area; the Pentair Clean & Clear Plus EC-160301 has four cartridges and 420 square feet.

This suits an inground-pool owner who values a single-cartridge system and a head secured with one knob. Account for its single-element format and listed 37.7-inch height when comparing maintenance needs and equipment-room space.

Listed on Amazon as: Hayward StarClear Plus Cartridge Swimming Pool Filter for InGround Pools

#5 · DE Filter Pick

5. Hayward ProGrid DE

• Weight: 83 lb
• Dimensions: 23.1 x 24.6 x 47.8 in

Best for: DE filtration for inground pools.

Why it ranks #5: Its 60-square-foot DE filtration area, grid elements and top-down backwashing make it a defined option for inground-pool owners choosing DE.

Up-flow filtration paired with top-down backwashing defines the Hayward ProGrid’s operating approach, enabling a specific flow and cleaning arrangement within its 60-square-foot DE system. The product is listed for inground pools and spas, making it an option for buyers selecting diatomaceous-earth filtration.

The high-impact grid elements support the stated up-flow filtration and top-down backwashing, linking the filter’s internal design to its cleaning workflow. Its 60-square-foot capacity is presented as a high-capacity option for inground pool use, while glass-reinforced copolymer construction is specified for corrosion-free durability and exposure to the elements. The 23.1-by-24.6-by-47.8-inch dimensions and 83-pound weight are practical planning factors for installation and service access.

Skip it if you prefer cartridge filtration; the Pentair Clean & Clear Plus EC-160301 uses four polyester cartridges and a 420-square-foot area.

Consider this Hayward for an inground pool or spa where DE filtration and the specified grid-flow arrangement suit the system. Its 83-pound weight and nearly 48-inch height deserve attention when planning placement and service access.

Listed on Amazon as: Hayward ProGrid Diatomaceous Earth DE Pool Filter for InGround Pools

#6

6. Pentair FNS Plus 48

• Weight: 74 lb
• Dimensions: 21.99"L x 22"W x 41"H
• Material Type: Polypropylene (PP)

Best for: Serviceable DE grid system.

Why it ranks #6: This 48-square-foot DE filter includes a removable grid pack and internal air relief; note that its valve is sold separately.

An easily removable Service-Ease grid pack makes the Pentair FNS Plus 48 distinctive, enabling access to its filter-grid assembly for service. This 48-square-foot DE filter also includes an integrated continuous high-flow internal air relief and a high-flow manual air relief valve.

Pentair says the larger filtration area of a DE filter allows longer periods between cleanings, linking the 48-square-foot area to a less frequent maintenance workflow. The removable grid pack supports access when service is needed, while the integrated continuous and manual air-relief components provide specified air-release provisions. Its fiberglass-reinforced polypropylene tank is described as chemical-resistant, and the product dimensions are about 22 by 22 by 41 inches. The valve is sold separately, a key system-planning detail.

Skip it if you need a valve included with the filter; the XtremepowerUS 22-inch Sand Filter System lists a 7-way multiport valve.

Choose this Pentair for a DE setup where a removable grid pack and the specified air-relief components suit the maintenance workflow. Plan separately for the valve, which is not included, and check its roughly 41-inch height against available space.

Listed on Amazon as: Pentair FNS Plus 48 Sq. Ft. DE Pool Filter (EC-180008)

#7

7. Pentair Triton II Sand

• Weight: 40 lb
• Material Type: Sand

Best for: Side-mount service access.

Why it ranks #7: The 24-inch side-mount sand filter has a fiberglass-reinforced tank and service-access features, but its compatible backwash valve is sold separately.

A swing-away diffuser provides instant access to sand and internal parts, enabling a service-oriented approach to this Pentair Triton II side-mount filter. Its one-piece fiberglass-reinforced tank and UV-resistant surface finish are specified for strength and durability in an inground-pool sand-filter setup.

The swing-away diffuser opens access to sand and internal components, while threaded internal parts are specified to ease service. A heavy-duty closure supports inspection, and the easy-to-read pressure gauge with air-relief valve gives the operator a stated pressure-checking point. The tank uses fiberglass-reinforced construction with a UV-resistant finish. This is a 24-inch side-mount model, but its side-mount multiport backwash valve is sold separately, so valve selection and installation need separate planning.

Skip it if you want a sand filter with a multiport valve listed as included; the XtremepowerUS 22-inch Sand Filter System includes a multiport filter.

This Pentair fits an inground-pool owner who values internal access and serviceable threaded parts in a side-mount sand filter. Plan for a compatible valve separately, using the listed compatible valve models when selecting the backwash assembly.

Listed on Amazon as: Pentair TR60 Triton II 24 inch Side Mount In Ground Pool Sand Filter (EC-140264)

#8

8. XtremepowerUS 22-Inch Sand Filter

• Weight: 32.2 lb
• Material Type: Plastic

Best for: Multiport sand-filter setup.

Why it ranks #8: This sand system includes a seven-way top-mount valve and is described for inground pools, though its listing gives differing pool-capacity figures.

A 7-way top-mount multiport valve gives this XtremepowerUS sand filter its clearest practical distinction, enabling multiple filter-system operations from the valve assembly. Its title lists both inground and above-ground pool use, making it a sand-media option for owners choosing a system around that filtration method.

The umbrella-fold self-cleaning lateral system is described as distributing water evenly, supporting balanced backwashing rather than concentrating flow in one area. Its design keeps the sand height level to expose water to the sand surface for filtration. The included multiport filter, stand, and manual provide core system components, while the top-mount 7-way valve gives the setup an integrated control point. Capacity figures differ between title and specifications, so avoid sizing from an assumed single number.

Skip it if you want cartridge filtration; the Hayward StarClear Plus W3C12002 uses a single-element cartridge.

Choose this for a pool owner who wants sand media and a top-mounted multiport valve in a system listed for inground and above-ground use. Resolve the listing’s conflicting capacity figures before sizing the filter.

Listed on Amazon as: XtremepowerUS 22-Inch Sand Filter for Inground & Above Ground Swimming Pools, Pool Sand Media Filtration System with 7-Way Top-Mount Multiport Valve, Up to 31,200 Gallons

#9

9. XtremepowerUS 24-Inch Sand Filter

• Weight: 39.8 lb
• Dimensions: 24 x 24.5 x 40.5 in

Best for: Sand filtration with winterizing drain.

Why it ranks #9: Its 24-inch sand tank has a seven-position valve and built-in drain, but the listing conflicts on pool capacity and specifies a 1.5-inch outlet.

A built-in drain gives this XtremepowerUS sand filter a practical winterizing and servicing feature, enabling water drainage at the filter itself. The listing also specifies a 1.5-inch main internal pipe and a 7-position port valve, with use described for inground and above-ground pools.

The 1.5-inch internal pipe is described as supporting smooth, free-flowing performance, while the built-in drain is intended to simplify winterizing and service. Its 7-position port valve provides the listed control arrangement, and the product title states a 300-pound sand capacity. Pool-size figures differ between title and features, so the owner should not rely on one listing number when sizing. The 24-by-24.5-by-40.5-inch dimensions help with placement planning.

Skip it if you want cartridge filtration instead of sand; the Hayward StarClear Plus W3C12002 uses a single-element cartridge.

This suits pool owners seeking sand filtration with a built-in drain and a 7-position valve for a setup listed across inground and above-ground pools. Check capacity carefully because the listing’s pool-size figures conflict.

Listed on Amazon as: XtremepowerUS 24" Sand Filter for Inground Ground/Above Ground Swimming Pool up to 37,200 Gallons 7-Position Port Valve 300 Pounds Sand Capacity

#10

10. XtremepowerUS 175 Cartridge Filter

• Weight: 28.6 lb
• Dimensions: 40 x 14 x 14 in

Best for: Large-pool cartridge upgrade.

Why it ranks #10: The title lists a 175-square-foot cartridge filter with two-inch ports for inground and above-ground pools, but its features instead state 150 square feet.

Two-inch inlet and outlet ports are the defining fit here, enabling a high-flow connection for pool systems with matching plumbing. XtremepowerUS lists this cartridge system for inground and above-ground pools as well as spas, giving owners upgrading or installing equipment several stated settings to consider.

The 175-square-foot title specification and heavy-duty filter tank position this as a substantial cartridge unit, while the product description states capacity for pools up to 52,800 gallons. The two-inch ports are the key plumbing consideration: they suit a setup with matching connections, rather than requiring a buyer to assume hose compatibility. Its listed 40-by-14-by-14-inch dimensions and 28.6-pound weight also give useful planning details for placement and handling.

Skip it if you need a sand-filter setup; the XtremepowerUS 22-inch Sand Filter System provides sand media filtration and a 7-way valve.

For owners upgrading a pool or spa system with two-inch plumbing, this cartridge filter offers a large stated filtration area and broad pool-type compatibility. Check available placement space and connection size before choosing it.

Listed on Amazon as: XtremepowerUS 175 Sq. Ft. Swimming Pool Cartridge Filter System, High-Flow Pool Water Filtration with 2-Inch Inlet & Outlet Ports, Heavy-Duty Filter Tank for In-Ground & Above-Ground Pools and Spas