Changes

**A perforated pipe with many rectangular slots has better drainage characteristics than a pipe with similar open area provided by fewer circular holes <ref>Hazenberg, G., and U. S. Panu (1991), Theoretical analysis of flow rate into perforated drain tubes, Water Resour. Res., 27(7), 1411–1418, doi:10.1029/91WR00779.</ref>.

**A perforated pipe with many rectangular slots has better drainage characteristics than a pipe with similar open area provided by fewer circular holes <ref>Hazenberg, G., and U. S. Panu (1991), Theoretical analysis of flow rate into perforated drain tubes, Water Resour. Res., 27(7), 1411–1418, doi:10.1029/91WR00779.</ref>.

*Non-perforated pipes should be used for conveyance to and away from the facility, including overflow.

*Non-perforated pipes should be used for conveyance to and away from the facility, including overflow.

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Perforated Pipe 550x550.jpg|Pipe with slotted perforations

Perforated Pipe 550x550.jpg|Pipe with slotted perforations

Pipe with connector.jpg|Perforated pipes awaiting installation, note the 30 degree connector used to facilitate maintenance.  

Pipe with connector.jpg|Perforated pipes awaiting installation, note the 30 degree connector used to facilitate maintenance.