10 Best Sand Filter For Inground Pools 2025 in the United States

The Hayward W3S310S ProSeries Sand Filter is a solid choice for inground pool owners looking for durable and efficient filtration. Its 30-inch size provides a good balance between capacity and space usage, making it suitable for medium to large pools. The corrosion-proof construction means it can withstand various weather conditions without rusting, which adds to its long-term reliability. One standout feature is the multilateral underdrain design with 360° slotted laterals that help ensure even water flow and effective backwashing, keeping the sand cleaner and the filter working well.

The 2-inch internal piping and top diffuser promote smooth water distribution for better filtration performance. The valve is sold separately, so you will need to buy the 6-position VariFlo control valve to fully utilize the filter’s functions like backwash and rinse, which may increase the initial setup cost. Customers have provided a variety of feedback, indicating it performs adequately though some users may have experienced issues or found maintenance a bit more involved. Sand filters generally require occasional backwashing and sand replacement every few years, which is standard but worth keeping in mind.

This filter is well-built and efficient for typical residential pool needs, but be sure to acquire the compatible valve and consider the maintenance routine before purchasing.

The Hayward W3S310T2 Pool Sand Filter is an excellent choice for inground pools, featuring a sizable 30-inch filter that promises efficient performance. Its multilateral underdrain assembly with self-cleaning 360° slotted laterals ensures balanced flow and effective backwashing, which is ideal for maintaining water clarity.

The filter media is evenly distributed thanks to the integral top diffuser, enhancing the filtration process. The unit is built with a corrosion-proof, rugged polymeric material, ensuring durability and reliable performance across various weather conditions. Maintenance is made easier with the large pressure sand/water drain and the 6-position VariFlo control valve, which simplifies the operation with its lever-action handle.

However, the filter's weight (83 pounds) and size (32 x 32 x 48.3 inches) may require careful consideration for installation and handling. This sand filter is well-suited for users seeking a durable, efficient, and easy-to-maintain solution for their inground pools.

The Hayward W3S270T ProSeries is a 27-inch top-mount sand filter designed for inground pools. Its size is suitable for medium to large pools, offering efficient water flow thanks to a well-designed internal system that ensures even water distribution and balanced backwashing. The filter uses sand as its media, which is common and effective at trapping debris, making pool maintenance easier.

It features a 6-position VariFlo control valve with a lever handle, allowing you to switch between filtering, backwashing, rinsing, and other functions with simple, straightforward operation. The tank is made from rugged, corrosion-proof polymeric material, which holds up well against weather and wear, promising durability over time. Also, a large pressure drain helps with quick servicing and winterizing.

This model is a solid choice for those seeking a reliable, easy-to-use sand filter that balances durability and functional features without being overly complicated.