F7F28C Systems IV Inline 1/4" Drinking Fountain or Sink Faucet Cold Water Filter Systems IV provides water filters that meet the homeowner's needs. Model F7F28C for under the sink provides sparkling clean water for the kitchen faucet or drinking fountain and is designed for water lines of 1/4". This filter is built to meet the demands of the homeowner's drinking water needs.Activated carbon filtration5 Micron filtrationChlorine reductionInstall in any positionBrass fittings for secure installationSystems IV water filters are "Lead-Free" Brass Compliant for CA Law AB1953