The Flotec RS3 is the correct replacement for the following water filter cartridge:
The Flotec RS3 - Drop-In 10" Sediment Water Filter is ideal for use with well water. This Flotec water filter removes extra fine sand, dirt, silt, rust, and scale particles from your household water. This sediment water filter measures 2 3/8 inches x 9 7/8 inches. This 10 inch water filter should be replaced every 2 months.