Note: Used when jointing the Vulcathene mechanical system to a 11/4” BSP waste tail. When making a connection to pipe a W151 38mm F.I. coupler should first be added to the outlet of a W121 reducer. Alternatively, the outlet of W121, which has a standard 11/2” BSP parallel thread, will accept the connecting nut of any of the Vulcathene traps illustrated in this catalogue.
