A soil branch is are one of the integral parts of any soil pipe system. It is used to bring horizontal and vertical pipe runs together, usually when connecting a pipe from a WC into the main vertical soil stack. The angle of this 88 degree curve branch creates a 2 degree fall that promotes self-cleansing. This branch also has a longer connection and a more swept design than the HS4022 branch, making it more suitable for foul drainage discharge. As Halifax pipes and fittings have no sockets, couplers are required to connect this branch to a pipe. A full dimensional drawing of this product can be found in the  Halifax technical catalogue.