"'drain' means a drainage pipe, or system of such pipes and related fittings for collection of waste water, that is not owned by, vested in or controlled by a water services authority, an authorised provider of water services, or a person providing water services jointly with or on behalf of a water services authority or an authorised provider of water services, and that is not a service connection, which is used, or to be used as the case may be, to convey waste water from one or more premises;".