- Lead-free design is suitable for all no-lead potable water installations.- Pack-joint end connections provide the maximum pullout resistance against internal pressure variations and backfilling stress.- Pack-joint end connections are designed to be installed onto the types K or L copper water tubing and Polyethylene plastic tubing.- Insert stiffeners are required at each pack-joint connection, when installing Polyethylene plastic tubing.CTS - Copper Tube SizeIPS - Iron Pipe SizeFIP - Female Iron PipeMIP - Male Iron PipeMinn PAT - Minneapolis Pattern