STANDARD or GRO Reverse Osmosis Replacement Filter Set Yearly
Reverse Osmosis Filter Set contains 2 carbon block filters and 1 sediment filter.
Filters should be changed yearly on city treated water under normal use and when connected to a SOFT water supply.
Filters should be changed every 6 months on private wells or when the reverse osmosis is connected to a HARD water supply.
Sediment filter is the first one on the line and one carbon should be installed in the middle and in the final housing.
If your RO looks like this with white, clear or black filter housings.