After Tet, grease traps and drainage systems become overloaded so what should restaurants do?

Key highlights

• Context: After Tet, restaurant drainage systems often face overload due to increased grease and wastewater during peak season.
• Problem: Restaurant grease traps and grease interceptors may not handle the full volume, leading to slow drainage and blockages.
• Solution: Combine grease interceptors with SFA Pumps’ active wastewater pumping solutions for more stable system performance.

After the Tet peak season, many restaurants begin to notice slow drainage, unpleasant kitchen odors, or even localized blockages. During the holiday rush, kitchens operate continuously with high intensity, and the amount of grease and wastewater increases significantly, putting extra pressure on the entire drainage system.

Many restaurant owners check or upgrade their restaurant grease trap or grease interceptor, but in reality, the issue often goes beyond a single component.

Why do restaurant drainage systems often face problems after Tet?

During Tet, increased customer volume leads to:

• Continuous cooking operations
• Higher grease discharge than usual
• Extended operating hours from morning until late night

Grease and food residues quickly accumulate in pipes and grease interceptors. If the restaurant grease trap is not cleaned regularly or its capacity does not match actual usage, overload becomes very likely.

Common warning signs include:

• Slow drainage at sinks
• Persistent kitchen odors
• Backflow during peak hours

Is a restaurant grease trap enough to solve the entire problem?

A grease interceptor plays an important role in separating grease before wastewater enters the main drainage line. However, a grease trap is not a complete solution.

In practice, a grease interceptor only captures a portion of floating grease. The following factors can still cause blockages:

• Fine food particles
• Sudden spikes in wastewater volume
• Long discharge distances
• Insufficient floor slope

If the downstream system lacks capacity or is not optimally designed, stagnation can still occur even when the grease trap is functioning properly.

When the issue goes beyond the grease interceptor

Many restaurants, especially leased premises, face technical limitations:

• Floor cutting is not possible to modify pipelines
• Long distances from the kitchen to discharge points
• Insufficient slope for gravity drainage
• Need for upgrades without interrupting operations

In such cases, simply upgrading the restaurant grease trap may not fully resolve the issue.

A proactive solution for a more stable restaurant drainage system

Instead of relying entirely on traditional gravity drainage, many restaurants are now adopting active wastewater pumping solutions to support the entire system.

SFA Pumps solutions allow:

• Active collection and transfer of wastewater
• Pumping through small-diameter pipes
• Discharge to distant or higher-level outlets
• Minimal floor cutting and structural modification

In commercial kitchens, solutions such as Sanigrey can collect grey water from sinks, glass washers, and preparation areas, helping reduce pressure on downstream pipes and grease interceptors.

With a more proactive drainage system, the risk of stagnation and blockages can be significantly reduced—even after peak seasons like Tet.

Read more: Sanigrey - wastewater solutions for small and medium commercial kitchens

Conclusion

After Tet is the ideal time to review the entire restaurant drainage system rather than focusing solely on the restaurant grease trap or grease interceptor.

A stable system requires proper coordination between grease separation and effective wastewater transfer solutions. When designed correctly and supported by proactive pumping technology, restaurants can minimize disruptions and maintain consistent service quality—even during future peak seasons.