When should South African factories schedule stormwater drain cleaning?

Maintenance schedules should align with regional weather patterns. For inland regions like Gauteng and KZN, schedule a system flush during late winter or early autumn (August/September) before summer thundershowers. For coastal regions like the Western Cape, schedule maintenance around late summer and early autumn (March/April) before heavy winter rains arrive.

Why Do Factory Stormwater Drains Flood And How Often Should They Be Cleaned?

Camjet Pty Ltd
Jun 8
2 min read

Factory stormwater drains flood when underground lines become choked with accumulated industrial silt, heavy yard debris, and tree root intrusions. To prevent catastrophic facility flooding and production downtime, commercial properties should clean their stormwater systems at least twice a year using high-pressure water jetting.

Few events disrupt an industrial facility or warehouse layout faster than a flash flood. Within minutes, a torrential downpour can transform a poorly maintained yard or loading bay into a lake—damaging high-value stock, halting production lines, and creating massive safety hazards for your staff.

Understanding why these blockages form and implementing a proactive cleaning schedule is the only reliable way to keep your operations dry and profitable.

The Top 3 Reasons Industrial Stormwater Networks Fail - and why factory stormwater drains flood

Commercial and industrial stormwater systems are designed to handle massive volumes of water, but they are highly susceptible to specific types of debris accumulation:

1. Silt, Grit, and Industrial Runoff

Unlike residential drains, industrial yards experience heavy vehicular traffic from trucks and forklifts. Over months, this traffic grinds down dirt and gravel into a fine silt that settles along the bottom of horizontal stormwater mains, slowly choking the system's capacity.

2. Seasonal Leaf Debris and Trash

Plastic wrapping, packaging straps, leaves, and twigs frequently find their way into open yard grates. Once inside the line, they form a dense framework that catches incoming sediment, quickly creating a solid, waterproof barrier.

3. Structural Pipe Failure and Root Ingress

In older industrial parks, underground concrete or clay pipes can crack due to heavy surface loads. Nearby trees exploit these structural weak points, sending roots inside to feed on the moisture, which completely blocks the line over time.

The Solution: High-Velocity Water Jetting

The only way to restore a stormwater line to 100% capacity is through high-pressure water jetting. Our specialized combination units pump water through custom-engineered nozzles at immense pressure, actively blasting away hardened silt and flushing out trash. Simultaneously, a high-vacuum extraction system sucks the loosened debris out of the manhole.

How Often Should Your System Be Maintained?

The timing of your biannual maintenance should change based on your specific regional weather patterns in South Africa:

For Inland Regions (Gauteng & KZN)

Schedule a comprehensive system flush during late winter or early autumn (August/September) before the intense summer thundershowers arrive.

For Coastal Regions (Western Cape)

Focus your maintenance schedules around late summer and early autumn (March/April) to prevent localized yard flooding when the heavy winter rains arrive.

Don't wait for the skies to clear. Check out our High-Pressure Jetting solutions to secure an annual preventative maintenance agreement for your facility today.