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Guidance Document 19 Guidance on metal rainwater systems and underground drainage

Publication Year

2026

Document Status

Current

Abstract

Factors to be considered when using underground sustainable drainage and siphonic roof drainage metal rainwater systems, during the planning process for property development and on site.

Document History

June 2026 edition. Supersedes 2018 edition. First published as Information Data Sheet GD 18 on May 2017.

Publisher Information

Metal Gutter Manufacturers Association

Formed in 1994, the Metal Gutter Manufacturers Association represents UK manufacturers of metal gutters.