Expanding Stoppers also know as drain plugs or bungs, are used for pipes and ducts in the size range from 1/2″ (12mm) to 48″ (1200mm). They are manufactured from nylon, aluminium or pressed steel (dependant on size) and are designed to prevent the ingress of water and dirt into new and existing pipes.
Expanding Stoppers are used for pipes in the size range from 2″ (50mm) to 48″ (1200mm). They are manufactured from either aluminium or pressed steel (dependant on size). All stoppers have a central bored shaft in the size range ½″ to 2″ (dependant upon stopper size). This shaft has an external BSP thread and is fitted with a sealing cap.