Our FloPlast underground drainage bends are available with either a single or a double socket. The sockets are a simple push fit design with a captive rubber seal that is housed inside a moulded recess. Drainage bends have a variety of used depending upon their angle. 87.5 degree bends are most commonly used vertically at the foot of a soil pipe or a rainwater pipe, whilst 45 degree bends are often used at the entry and exit points of an inspection chamber. 30 and 15 degree bends are generally used in the horizontal plane when a slight change of direction is required.We always recommend the use of silicon lubricant with all push fit drainage fittings as it makes installation easier and maintains and enhances the performance of the seal in the long run.