The key to long-term wastewater treatment system performance lies in regular, professional servicing. In this recent case study, our engineers carried out a scheduled service of a WPL HIPAF400 sewage treatment system, ensuring it continues to operate efficiently and in line with environmental compliance standards.

Upon arrival at the site, our engineer began by removing the tank lids to assess the system’s current condition. The WPL HIPAF400 was found to be operating correctly, with no faults or alarms present. The primary settlement zone was beginning to thicken, a natural sign of sludge accumulation over time. While not yet critical, this observation will help future sludge management planning to maintain optimal system flow.

All treatment zones were aerating effectively, indicating that the biological processes within the system were functioning as intended. The final settlement tank appeared clean, with no signs of carryover or solids build-up – an excellent indicator of healthy separation and treatment.

Next, our engineer inspected both blower units, which are responsible for supplying air to the treatment zones. Each blower was confirmed to be running correctly, delivering the appropriate airflow to support the aerobic digestion process. The air intake filters inside the blower pipework were cleaned to remove any dust or debris that could restrict airflow and reduce efficiency.

He then tested both airlift systems, which play a crucial role in moving effluent between zones. These were found to be working in perfect coordination with the solenoid valves, ensuring balanced and controlled flow throughout the system. This is essential for maintaining the correct retention times and treatment quality.

A full inspection of the electrical connections was carried out, with all terminals found to be tight, dry and free from corrosion. This step is vital in preventing electrical faults that could disrupt system operation or trigger false alarms.

Our engineer also examined all airlines for signs of wear, leaks, or cracks. Each connection was verified to be secure, with no air leaks detected. Maintaining airtight connections is critical for consistent aeration and energy efficiency.

With all components inspected and tested, the WPL HIPAF400 system was confirmed to be aerating well and operating as designed. The service was completed without the need for any immediate repairs, but the thickening primary zone was noted for future attention.

This case study highlights the importance of routine servicing in identifying early signs of wear, maintaining system integrity and ensuring uninterrupted wastewater treatment performance. By proactively managing these systems, we help our clients avoid costly breakdowns and maintain compliance with environmental regulations.

At RA Dalton, we’re proud to offer expert servicing and support for a wide range of sewage treatment systems. Whether you’re managing a domestic installation or a commercial site, our team is here to keep your system running smoothly.

Do you need advice or a service visit? Call us on 01388 537050 or email info@radalton.co.uk to speak with our team of professionals.