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→Design
|Avoid clogging/freezing
|Avoid clogging/freezing
|style="text-align: left|
|style="text-align: left|
*Minimum 450 mm;
*Minimum 450 mm diameter inlet pipe;
*Preferred pipe slope: > 1 %;
*Preferred pipe slope: > 1 %;
*If submerged, obvert 150 mm below expected maximum ice depth
*If submerged, obvert 150 mm below expected maximum ice depth
|Avoid clogging/freezing
|Avoid clogging/freezing
|style="text-align: left|
|style="text-align: left|
*Minimum: 450 mm outlet pipe;
*Minimum: 450 mm diameter outlet pipe;
*Preferred pipe slope: > 1 %;
*Preferred pipe slope: > 1 %;
*If orifice control used, 75 mm diameter minimum;
*If orifice control used, 75 mm diameter minimum;