This bend is commonly used in conjunction with an SP435 bottom offset to form a swan neck that allows the 110mm soil and vent pipe to be diverted out and around the eaves of the building before terminating above the roof level. The angle of this bend is 45 degrees. This type of offset bend has a ring seal push fit socket on one end and a solvent weld socket on the other. If you are using this fitting vertically the push fit socket should always be positioned at the top.