The RS4 is a polyspun cartridge for
any OMNI filter unit, except the BF7
Wholehouse Filter Unit and the F1 Faucet
Mount Filter Unit. Polyspun cartridges are good at removing rust and sediment particles
from water that's entering your home.
Change filter every 3 months.
Change O-ring every 3rd filter.
If you have an
older Omni filter model that has been discontinued and need an O-Ring,
please call our customer service number: (855) 855-1976 for
Do you need tank
wrenches or o-rings?