The 2000 Series is based on the outside diameter (O.D.) of the cartridge being between 2-2.99 inches.

Note: If the cartridge O.D. is very close to the next level (for example, 2 15/16) it maybe necessary to check the next series (ex. 3000 Series)

The Unicel 3000 Series is based on the outside diameter (O.D.) of the cartridge being between 3-3.99 inches.

Note: If the cartridge O.D. is very close to the next level (for example, 3 15/16) it maybe necessary to check the next series (ex. 4000 Series)

The Unicel 4000 Series is based on the outside diameter (O.D.) of the cartridge being between 4-4.99 inches.

Note: If the cartridge O.D. is very close to the next level (for example, 4 15/16) it maybe necessary to check the next series (ex. 5000 Series)

The Unicel 5000 Series is based on the outside diameter (O.D.) of the cartridge being between 5-5.99 inches.

Note: If the cartridge O.D. is very close to the next level (for example, 5 15/16) it maybe necessary to check the next series (ex. 6000 Series)

The Unicel 6000 Series is based on the outside diameter (O.D.) of the cartridge being between 6-6.99 inches.

Note: If the cartridge O.D. is very close to the next level (for example, 6 15/16) it maybe necessary to check the next series (ex. 7000 Series)

The Unicel 7000 Series is based on the outside diameter (O.D.) of the cartridge being between 7-7.99 inches.

Note: If the cartridge O.D. is very close to the next level (for example, 7 15/16) it maybe necessary to check the next series (ex. 8000 Series)

The Unicel 8000 Series is based on the outside diameter (O.D.) of the cartridge being between 8-8.99 inches.

Note: If the cartridge O.D. is very close to the next level (for example, 8 15/16) it maybe necessary to check the next series (ex. 9000 Series)

The Unicel 9000 Series is based on the outside diameter (O.D.) of the cartridge being between 9 inches or greater.

If the Unicel part number is C-2302, then our lookup number is UNC2303

If the Unicel part number is 4CH-23, then our lookup number is UNC4CH24.