Project: Septic Tank Replacement & Sewage Treatment Plant Installation
Location: Wirral
Property Type: Domestic
Issue: Foul odours caused by a failing, non-compliant septic tank discharging into a nearby watercourse
Solution: Excavation, removal of the existing septic tank and installation of a new sewage treatment plant with compliant drainage connections
Service Septic Tank Replacement & Sewage Treatment System Installation
Clear Drain Services was called to a domestic property on the Wirral after the homeowner reported persistent foul odours around their garden. Following a detailed inspection, we discovered the existing septic tank had reached the end of its serviceable life and was no longer operating correctly.
Further investigation revealed the ageing system was discharging untreated wastewater directly into a nearby watercourse, meaning it no longer complied with current environmental regulations. The failing tank not only created unpleasant smells but also posed a potential pollution risk and required urgent replacement.
Whats the solution for a damaged septic tank?
After assessing the site and discussing the available options with the homeowner, we recommended replacing the existing septic tank with a modern sewage treatment plant designed to meet current Building Regulations and Environment Agency General Binding Rules.
Our team carefully excavated the existing system before removing the old tank and preparing the excavation for the new installation. Using specialist lifting equipment, the new treatment plant was lowered into position and connected to both the property’s existing drainage network and the new outlet pipework.
Once all connections had been completed, the installation was thoroughly checked to ensure correct levels, watertight joints and efficient operation before the excavation was backfilled and the site reinstated.
The result was a fully compliant wastewater treatment system designed to provide many years of reliable performance with straightforward ongoing maintenance.
Why Septic Tanks Need Replacing
Many properties across the Wirral, Cheshire and North Wales that are not connected to the public sewer network still rely on private drainage systems such as septic tanks or sewage treatment plants.
Older septic tanks can begin to fail for a number of reasons, including:
- Structural cracking caused by age or ground movement
- Collapsed inlet or outlet pipework
- Tree root ingress
- Poor maintenance or infrequent emptying
- Non-compliance with current environmental regulations
Since the introduction of the Environment Agency’s General Binding Rules, many older septic tanks that discharge directly into rivers, streams or ditches no longer meet the required environmental standards and often need upgrading to a compliant sewage treatment plant.
Common signs your septic tank may require attention include:
- Persistent foul smells
- Slow-draining toilets or sinks
- Pooling water around the tank
- Sewage backing up into the property
- Exceptionally lush grass around the drainage field
- Frequent emptying requirements
Planned Installations or Emergency Call Outs
Whether you’re planning to replace an ageing septic tank as part of a property improvement project or require an emergency response following a system failure, Clear Drain Services can manage the entire installation process.
From initial site assessment and excavation through to installation, testing and reinstatement, our experienced team ensures every sewage treatment system is installed safely, efficiently and in accordance with current regulations.
The solution to faulty se[tic tanks
The ageing septic tank was safely removed and replaced with a modern sewage treatment system that fully complies with current environmental requirements. By upgrading the property’s wastewater treatment system, we eliminated the source of the foul odours while preventing untreated sewage from entering the nearby watercourse.
The new treatment plant provides significantly improved performance, treating wastewater before it is discharged and helping to protect local rivers and the surrounding environment. Unlike older septic tanks, modern treatment systems are designed to achieve much higher treatment standards, reducing environmental impact while providing a dependable long-term solution for the homeowner.
Following installation, the system was tested, commissioned and connected to the property’s drainage network, ensuring everything operated correctly before the excavation was reinstated. The homeowner was left with a compliant, efficient wastewater treatment system that offers reliable operation, simpler maintenance and peace of mind for many years to come.
Most domestic septic tanks should be emptied every 12 months, although this depends on the size of the tank and the number of people using the system. Waiting five years between emptying is generally much longer than recommended and can increase the risk of blockages, odours and system failure.
A well-maintained concrete or GRP septic tank can often last 20–40 years or more. However, ageing systems may become non-compliant with modern environmental regulations before they physically fail.
If your existing septic tank discharges directly into a watercourse, you may need to upgrade to a sewage treatment plant to comply with the Environment Agency’s General Binding Rules.
Yes. Clear Drain Services carries out both planned septic tank installations and emergency replacements where a system has failed or become unsafe.




