# Building Regulations (Northern Ireland) 2000, Regulation N1: Interpretation and application

Extent: N.I.
Status: prospective

(1) In this Part—
foul water means waste from a sanitary appliance and water which has been used for cooking or washing purposes and not contaminated by trade effluent;
rain-water drainage includes gutters, pipes, drains and fittings which convey rain-water only;
sanitary appliance has the meaning assigned to it by regulation P1;
sanitary pipework means a pipe or system of pipes for conveying foul water from a fitting to an underground foul drain; and
underground foul drainage includes drains and private sewers used in connection with buildings but not a system which is solely for the conveyance of subsurface water.
(2) Regulation N5 shall not apply to a drainage system intended for use in connection with a roof or balcony of 6 m2 or less in area, unless that roof or balcony receives a flow of rain-water from another part of a building.

---
Source: https://www.legislation.gov.uk/nisr/2000/389/regulation/N1 (the official version)
Page: https://openlegislation.uk/building-regulations-northern-ireland-2000/regulation-N1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.