Replacement cartridge for the SC 100 and HSC 100

The RSC 100 is the the refill cartridge for the SC100 and HSC100 unit. Simply use the wrench to unscrew the housing, pull out the old cartridge and drop in the new and you are done! You can tell when a cartridge is nearing the end as the white area will gradually get closer to the bottom. When you have about 1/2" left, is a good time to order the refill so you have it available.