7.5.5.5.Provision for Future Installations

(1) Where provision is made for a fixture to be installed in the future, the drainage system and venting system shall be sized accordingly and provision made for the necessary future connections. (2) Except as required in Sentence 7.5.7.7.(2), where a plumbing system is installed in a building, every storey in which plumbing is or may be installed, including the basement of a building, shall have extended into it or passing through it a vent pipe that is at least NPS 1½ for the provision of future connections.