The USWF 20"x2.5" Melt Blown Sediment Filter has a 1-micron rating, meaning it captures fine particles such as silt, sand, rust, dirt, and sediment as small as 1 micron in size. This tight micron rating makes it ideal as a pre-filter for reverse osmosis systems or as a polishing filter after coarser sediment stages, protecting downstream carbon blocks and RO membranes from premature clogging.

This USWF filter measures 20 inches in length by 2.5 inches in diameter (20" x 2.5"), making it a standard size compatible with most 20-inch slim-line (Standard Capacity) whole house filter housings and under-sink filtration systems. It fits housings from brands such as Pentek, Culligan, American Plumber, and other standard 20" x 2.5" compatible units without requiring adapters.

The USWF 20"x2.5" 1-micron melt blown sediment filter typically lasts 3 to 6 months, depending on the sediment load and water usage in your home. Households with well water or high turbidity may need to replace the filter more frequently, while municipal water users often reach the full 6-month lifespan. Replacing on schedule maintains flow rate and prevents pressure drops across your system.

The USWF 1-micron filter is manufactured from 100% pure polypropylene fibers that are melt blown and thermally bonded into a true-gradient density structure—coarser on the outside and finer toward the core. This graded-density design traps larger particles on the outer layers while finer particles are captured deeper inside, maximizing dirt-holding capacity and extending filter life. It contains no adhesives, binders, or surfactants, making it FDA-compliant for food-contact and drinking water use.

This USWF melt blown sediment filter is designed for cold water applications with an operating temperature range up to 145°F (62°C) and is well-suited for well water, city water, and RO pre-filtration. It effectively removes sand, silt, rust flakes, and fine sediment that are common in well water systems. For hot water use, a specialized high-temperature filter is recommended. Always install the filter in the flow direction indicated on the housing for optimal performance.