Technical booklet N
Drainage
About Technical booklet N
Technical booklet N gives guidance on drainage. It covers sanitary pipework, foul and combined drainage, and the gutters and pipes that carry rainwater.
What it covers
- Sanitary pipework and water seals
- Underground foul drainage
- Access points for clearing blockages
- Rainwater gutters and pipes
- Materials for pipes, fittings and joints
Technical booklet N - Drainage - October 2012
Department of Finance (Northern Ireland)