US-2-R Replacement cartridges for US-2 system. Clear, clean, great-tasting water for drinking and cooking is easier to achieve than ever before with the Culligan US-22-stage under-sink Premium Filtration System. The Culligan US-2 Under-sink Premium Drinking Water Filter System features a twist-on, twist-off cartridge design for easy cartridge change, dedicated faucet with electronic cartridge change indicator, quick-connect fittings, and double water shut-off so water supply does not need to be turned off. The filter reduces lead, microbial cysts such as cryptosporidium and giardia, lindane, atrazine, bad taste andodor, aesthetic chlorine taste andodor. The US-2R cartridge set has a life of 6 months or 500 gallons. US-2-R Premium Filtration cartridge set is certified by IAPMO R andT and has a 1-year limited warranty.