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10 Best In-Ground Swimming Pool Filters 2025 in the United States

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Our Top Picks

#1

Winner

Hayward Pool Filter, 325 Square Foot (W3C3030), Gray

Rating
9.9
Chosen by1,328
Maintenance Requirements
Durability and Lifespan

Most important from
412 reviews

Maintenance Requirements
Replacing the plug with a valve for drainage makes maintenance easier over time, preventing issues with tough-to-install plugs.
Durability and Lifespan
The filter has been running steadily and effectively, beginning to clear up the pool after just 48 hours.

The Hayward W3C3030 SwimClear Cartridge Pool Filter is designed with a top manifold configuration, offering excellent filtration and hydraulic performance. This can help reduce operating costs, which is a significant advantage. The filter's 325-square-foot cartridge is cleanable, which eliminates the need for backwashing and makes maintenance simpler and more eco-friendly. This is an appealing feature for users looking to save on water usage and maintenance time.

The heavy-duty tank and tamper-proof flange clamp ensure durability and security, making it a long-lasting option for pool owners who face tough environmental conditions. Additionally, the high-capacity manual air relief valve simplifies the process of bleeding air from the system, enhancing ease of use. However, the filter is relatively heavy at 74.8 pounds, which could make installation more challenging. It also has a large footprint, so space considerations are necessary.

Rating
9.9
Chosen by1,328
Maintenance Requirements
Durability and Lifespan

Most important from
412 reviews

Maintenance Requirements
Replacing the plug with a valve for drainage makes maintenance easier over time, preventing issues with tough-to-install plugs.
Durability and Lifespan
The filter has been running steadily and effectively, beginning to clear up the pool after just 48 hours.
#2

Hayward W3S180T ProSeries Sand Filter, 18 In., Top-Mount for Above-Ground Pools

Rating
9.8
Filter Type
Flow Rate
Filter Size

Most important from
1755 reviews

Filter Type
This sand filter delivers sparkling clean pool water with minimal maintenance compared to cartridge filters.
Flow Rate
The 7-position VariFlo valve offers versatile control, making backwashing and rinsing straightforward and effective.
Filter Size
Handling and moving the unit can be challenging due to its weight, especially when filled with 50 pounds of sand.
Maintenance Requirements
Backwashing only when pressure rises significantly saves time and keeps the filter working efficiently for longer.
Durability and Lifespan
The filter’s robust, corrosion-proof construction ensures long-lasting durability and reliability.

The Hayward W3S180T ProSeries is an 18-inch top-mount sand filter designed mainly for above-ground pools but often considered by users familiar with in-ground pool filtration as well. It uses sand as the filter medium, a common and effective choice for trapping dirt and debris. The filter features a strong, corrosion-proof build that stands up well to weather and promises durability over time.

Its design includes an umbrella-fold lateral system and a top diffuser that help water flow evenly through the sand, improving filtration efficiency and making backwashing (cleaning the filter) more thorough and balanced. The 7-position VariFlo valve allows easy adjustment of water flow, helping maintain good pressure without straining the system. Maintenance is straightforward with a large drain valve to quickly empty water and sand when servicing or winterizing.

Sand filters require periodic sand replacement every few years to keep filtering well. This Hayward filter is a solid choice for pool owners seeking a reliable, easy-to-maintain sand filter with good durability, especially suited for small to medium-sized pools.

Rating
9.8
Filter Type
Flow Rate
Filter Size

Most important from
1755 reviews

Filter Type
This sand filter delivers sparkling clean pool water with minimal maintenance compared to cartridge filters.
Flow Rate
The 7-position VariFlo valve offers versatile control, making backwashing and rinsing straightforward and effective.
Filter Size
Handling and moving the unit can be challenging due to its weight, especially when filled with 50 pounds of sand.
Maintenance Requirements
Backwashing only when pressure rises significantly saves time and keeps the filter working efficiently for longer.
Durability and Lifespan
The filter’s robust, corrosion-proof construction ensures long-lasting durability and reliability.
#3

Hayward W3C12002 StarClear Plus Cartridge Pool Filter, 120 Sq. Ft.

Rating
9.7
Filter Type
Flow Rate
Filter Size

Most important from
937 reviews

Filter Type
This filter works amazingly well, even for larger pools, and cleared a very green pool in just two days after replacing a sand filter.
Flow Rate
Initially, this filter cleaned the water much quicker than expected, and the installation was straightforward.
Filter Size
Be cautious when choosing filter sizes; this one works perfectly even if pool professionals suggest larger, more expensive options.
Maintenance Requirements
The filter is very easy to wash and maintain, much simpler than dealing with multiple cartridges.
Durability and Lifespan
Over time, the latch system for the lid failed, leading to leaks and eventually a complete blowout, indicating a design flaw.

The Hayward W3C12002 StarClear Plus Cartridge Pool Filter is designed to offer high efficiency and reliability for in-ground pools. This filter uses a cartridge type, which is known for its ease of maintenance as it requires less frequent cleaning compared to sand filters. With a size of 120 square feet, it is suitable for medium-sized pools, providing ample filtration space to ensure clear and clean water.

The extra-large, single-element cartridge is engineered with precision for strength and optimal flow, and the molded end caps add durability to its design. The single-locking knob simplifies the process of securing the filter head, and the rotatable filter head allows for easy access to the cartridge element, making maintenance straightforward.

The filter's single-piece injection-molded base and body enhance its durability, ensuring it can withstand corrosion and provide long-lasting performance. Moreover, it offers versatile plumbing connections, making it adaptable to various setups. Customer reviews rate it highly at 4.6 out of 5 stars, indicating strong user satisfaction. However, potential buyers should note that it measures 37.7 inches in height and weighs 30 pounds, which might be bulky for some setups. This filter is a solid choice for pool owners looking for a durable and easy-to-maintain filtration system.

Rating
9.7
Filter Type
Flow Rate
Filter Size

Most important from
937 reviews

Filter Type
This filter works amazingly well, even for larger pools, and cleared a very green pool in just two days after replacing a sand filter.
Flow Rate
Initially, this filter cleaned the water much quicker than expected, and the installation was straightforward.
Filter Size
Be cautious when choosing filter sizes; this one works perfectly even if pool professionals suggest larger, more expensive options.
Maintenance Requirements
The filter is very easy to wash and maintain, much simpler than dealing with multiple cartridges.
Durability and Lifespan
Over time, the latch system for the lid failed, leading to leaks and eventually a complete blowout, indicating a design flaw.

Buying Guide for the Best In-Ground Swimming Pool Filters

Choosing the right in-ground swimming pool filter is crucial for maintaining clean and clear water in your pool. The filter is responsible for removing debris, dirt, and other contaminants from the water, ensuring a safe and enjoyable swimming experience. When selecting a pool filter, it's important to consider various specifications to find the best fit for your pool's size, usage, and maintenance preferences. Here are the key specifications to consider and how to navigate them to make an informed decision.
Filter TypeThere are three main types of pool filters: sand, cartridge, and diatomaceous earth (DE). Sand filters use sand to trap debris and are easy to maintain but may not filter as finely as other types. Cartridge filters use a replaceable cartridge to capture particles and offer better filtration than sand filters, with less maintenance. DE filters use a fine powder made from fossilized algae to provide the highest level of filtration, capturing the smallest particles, but they require more maintenance. Choose a filter type based on your preference for maintenance and the level of filtration you need.
Flow RateThe flow rate of a pool filter, measured in gallons per minute (GPM), indicates how much water the filter can process in a given time. This is important because it affects how quickly your pool water is cleaned. To determine the appropriate flow rate, consider the size of your pool and the pump's capacity. A higher flow rate is suitable for larger pools, while a lower flow rate may be sufficient for smaller pools. Ensure the filter's flow rate matches or exceeds your pool pump's flow rate for optimal performance.
Filter SizeFilter size, often measured in square feet for cartridge and DE filters or in pounds for sand filters, determines the filter's capacity to hold debris before it needs cleaning or backwashing. Larger filters can handle more debris and require less frequent maintenance, making them ideal for larger pools or pools with heavy usage. Smaller filters may be suitable for smaller pools or those with lighter usage. Choose a filter size that matches your pool's size and usage patterns to minimize maintenance and ensure efficient filtration.
Maintenance RequirementsDifferent types of filters have varying maintenance needs. Sand filters require periodic backwashing to clean the sand, while cartridge filters need the cartridges to be cleaned or replaced regularly. DE filters require backwashing and replenishing the DE powder. Consider how much time and effort you are willing to invest in maintaining your pool filter. If you prefer low maintenance, a sand or cartridge filter may be more suitable. If you don't mind more frequent maintenance for superior filtration, a DE filter could be the best choice.
Durability and LifespanThe durability and lifespan of a pool filter are important factors to consider for long-term use. Sand filters typically last the longest, with sand needing replacement every 5-7 years. Cartridge filters have a lifespan of 1-3 years for the cartridges, while the filter housing can last longer. DE filters require the DE powder to be replaced regularly, but the filter grids can last several years. Choose a filter with a lifespan that aligns with your expectations for longevity and consider the cost and frequency of replacement parts.

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