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

The Hayward W3S244T ProSeries is a sand filter designed for in-ground pools, offering reliable and efficient water cleaning. It uses a top-mount design with a 24-inch filter tank made from durable, corrosion-proof polymer, which means it can handle various weather conditions without rusting or breaking down easily. The filter includes a multilateral underdrain system with self-cleaning slotted laterals that help ensure water flows evenly through the sand bed, improving filtration and making backwashing more effective and less frequent. It also has a 6-position control valve that’s easy to operate, letting you switch between functions like filtering, backwashing, and rinsing with a simple lever. Maintenance is straightforward because the unit has a large drain for quick winterizing or servicing.

Hayward filters generally support moderate to high flow suitable for typical residential pools. With a sturdy build and user-friendly controls, this filter is a solid choice for pool owners looking for long-lasting performance without complicated upkeep. One possible downside is that it weighs 48 pounds and measures over 2 feet tall, so it requires a decent amount of space and some effort to install. This filter is well-suited for homeowners who want dependable sand filtration, easy maintenance, and durable construction without dealing with complex technology.

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.