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<gallery mode="packed" widths=200px heights=200px>
<gallery mode="packed" widths=200px heights=200px>
Perforated_pipe_grass_swale_system_diagram.png|The 'Etobicoke Exfiltration system' (1994), Etobicoke ON
File:2014 during cleaning.JPG|A pair of perforated [[pipes]] can be seen in this manhole during cleaning operations. Four connections in total as this manhole is part-way along the system.
File:2014 during cleaning.JPG|A pair of perforated [[pipes]] can be seen in this manhole during cleaning operations. Four connections in total as this manhole is part-way along the system.
</gallery>
</gallery>
[[Category:Gallery]]
[[Category:Gallery]]