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According to the site requirements, a connection between clay pipes and other materials such as (PVC or Cast Iron), can sometimes be required. Due to the differences in dimensions such as wall thickness and tolerances, a direct connection will not be possible. In this case the use of adapter pieces such as the "U-Ring" or "A-ring" is advised.
"U" Ring (Adapter)
The U-ring is used to connect vitrified clay pipe sockets to the spigot end of cast iron or PVC pipes. Available in nominal sizes 100 to 200mm.
"A" Ring (Adapter)
The A-ring is used to connect vitrified clay pipe spigots end to cast iron or PVC sockets. Available in nominal sizes 100 to 200mm.