TYCO TF Series Rapid Install Sprinkler (RIS) Adapters are conversion fittings for 1 inch connections. They help you connect TYCO RIS (Rapid Install) ESFR sprinklers to standard tapered pipe threads (NPT or ISO), or convert a RIS welded fitting back to standard tapered threads for retrofit work. They are carbon steel, gloss black coated, and UL/C-UL Listed and FM Approved.