Why Winter Demands Extra Attention to Oil Trap Cleaning at Car Wash Bays

The Science: Why Oil and Sludge Solidify Faster in Winter

Oil traps are designed to allow lighter hydrocarbons (oil, fuel, etc.) to float to the surface while heavier solids settle at the bottom. In temperate conditions, this separation process works efficiently.

But in winter, cold temperatures cause:

• Oil and grease thicken and solidify more quickly

• Sludge is to become denser and more adhesive

• Reduced flow rates through the interceptor, leading to a build-up

• Increased risk of blocked pipes and system failure

The Risks of Skipping Oil Trap Maintenance in Cold Weather

Failing to prioritise oil trap cleaning during winter months can result in:

• Full or partial system blockages, causing wastewater to back up

• Increased oil and sludge discharge into municipal sewers (leading to potential fines and non-compliance)

• Environmental hazards, with oily water escaping into stormwater drains

• Unpleasant odours around the car wash bay

• Unexpected downtime during peak car wash periods

• Costly emergency pump-outs and unplanned servicing

Proactive Steps for Winter Oil Trap Maintenance

The good news is that winter-related oil trap issues are entirely preventable with proactive maintenance:

1. Increase Cleaning Frequency

If your oil trap is normally cleaned every 3 to 6 months, switch to monthly or bi-monthly cleaning during winter to prevent hardened buildup.

2. Schedule Servicing Before Peak Cold

Have your oil traps professionally cleaned before the coldest months hit, ensuring the system is in optimal condition going into winter.

3. Conduct Regular Visual Checks

Train your staff to look for early warning signs such as slow drainage, standing water in the wash bay, or unusual smells.

4. Prevent Oil Overload

Minimise the amount of oil and fuel residues entering the trap by maintaining good upstream practices, such as pre-wash wiping or absorbent pads.

5. Document Maintenance

Keep thorough records of cleaning and inspections, not only for your own planning but also for compliance with local municipal regulations.

Why Professional Cleaning Is Essential in Winter

DIY maintenance is not enough — professional oil trap cleaning delivers:

• Complete removal of hardened oil, sludge, and debris

• Inspection of inlet/outlet pipes to prevent winter blockages

• Safe and compliant disposal of collected waste

• Reduced risk of emergency call-outs and fines

Partnering with a professional service provider ensures your system runs smoothly even during the harshest months, protecting both your business and the environment.

Conclusion

Winter brings enough operational challenges; don’t let your oil trap become one of them.

By prioritising oil trap cleaning during the colder months, you:

• Prevent costly system failures

• Maintain compliance with wastewater regulations

• Keep your car wash operating at peak performance

• Protect your reputation and customer experience

Be proactive, not reactive. Schedule your winter oil trap maintenance today and drive through the season with confidence.