NIB-SEAL Insulated Handle System
NIB-SEAL, a patented insulated handle system, is used in NIBCO two-piece and three-piece bronze ball valves to prevent moisture from entering / exiting through them. This non-conductive CPVC NIB-SEAL handle has a unique thermal barrier design to prevent loss of thermal energy as in exposed metal handles. They also provide a clearly visible indicator to show the open or closed position of the NIBCO valves from a distance.