Pros
- Excellent longevity, lasting 4-9 months in real use per customer feedback
- Improves water clarity and taste immediately upon installation
- Easy fit in standard housings with reliable performance
- Superior value compared to pricier alternatives
- Good flow rates prevent pressure drops
Cons
- Optimized for chlorinated water, less ideal for non-chlorinated supplies
- 20-micron rating may allow finer particles to pass
- Not the best choice for very hard water conditions
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.
Model: RS1-DS3-S06
Size: 10" x 2.5" (1.9"D x 2.8"W x 9.8"H)
Micron Rating: 20 Micron
Material: Pleated Cellulose with Polypropylene Core
Capacity: 15,000 Gallons
Compatibility: All 10-inch standard filter housings
Best Use: Chlorinated water supplies
Certification: NSF
Choose RS1 if your water has visible sediment like sand or rust and you use a 10-inch standard housing. Replace every 3 months or when pressure drops. For finer filtration, follow with 5-micron cartridges. Ideal for whole house pre-filtration before carbon stages. Not suited for non-chlorinated or heavily contaminated water without additional treatment.