The Pentair OMNIFilter RS1 is a pack of two pleated cellulose sediment filter cartridges designed for 10-inch x 2.5-inch standard whole house water filtration systems. It targets medium-sized particles like sand, dirt, silt, and rust down to 20 microns, making it perfect for homeowners dealing with sediment buildup from municipal or well water on chlorinated supplies. This economical replacement helps safeguard plumbing, appliances, and downstream filters from premature wear.
Standout features include pleated media for maximum surface area and high dirt-holding capacity, wrapped around a durable polypropylene core for structural integrity. Users report noticeable improvements in water clarity and taste right away, with filters maintaining good flow rates over extended periods, often 4 to 9 months depending on water conditions. It pairs well with carbon filters for comprehensive treatment and fits popular OMNIFilter systems like U24, U25, OB1, and WH5.
Build quality is solid, with NSF certification and compact dimensions of 1.9 x 2.8 x 9.8 inches for easy handling and installation. The 15,000-gallon capacity means fewer changes, typically every 3 months or at signs of pressure drop. While effective for its rating, it may not capture ultra-fine particles, and performance shines most on chlorinated water.
Overall, the RS1 delivers reliable sediment reduction at a great value, earning praise for fit, flow, and durability. It's a smart choice for routine maintenance in sediment-prone homes, though pair it with finer filters for demanding needs.
