# Building Regulations (Northern Ireland) 2000, Regulation N4: Underground foul drainage

Extent: N.I.
Status: prospective

Underground foul drainage shall—
(a) consist of pipes and fittings—
(i) of such size, layout, construction and watertightness; and
(ii) with sufficient ventilation,
to ensure the hygienic conveyance of foul water to a sewer, cesspool, septic tank or similar structure; and
(b) have such means of access as is necessary to facilitate the clearance of blockages.

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Source: https://www.legislation.gov.uk/nisr/2000/389/regulation/N4 (the official version)
Page: https://openlegislation.uk/building-regulations-northern-ireland-2000/regulation-N4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.