OmniFilter has discontinued the RS4-DS. Consider instead the RS14-DS, a polyspun filter with the same capacity and flow rate but a 10 micron rating.
The OmniFilter RS4-DS Whole House Polyspun Filter 2 pack reduces dirt and sand sediment and rust particles from your water. The OmniFilter RS4-DS can be used in Omni whole house models R12 and R14, OT32 Series A UnderSink filter system and any other whole house filter system that calls for a standard size 5 micron Polyspun filter.
The RS4-DS is a 2 pack of RS4 filters so this package is good for 20,000 gallons or 6 months.
Each OmniFilter RS4 Whole House Polyspun Filter is rated for
The OmniFilter RS4-SS Whole House Polyspun Filter reduces dirt and sand sediment and rust particles from your water.