The 135° Black Spigot/ Solvent Socket 110mm Soil Pipe Offset Bend is generally used for changing the direction of 110mm soil pipe. This product is used as the bottom bend when forming an offset bend at the top of a soil stack with a 431967 bend used as the top bend. The bend has a spigot at 1 end which should always form the lower joint & a socket at the other end which should always be used to form the top joint.