Our Sewage Treatment Plant Installation Process
Complete Engineering & Groundworks
HOW DOES IT WORK?
Our Step-by-Step Installation Framework
1. Site Survey & Soil Testing: Percolation testing & water table assessment.
We visit your property to evaluate your existing drainage network, inspect potential discharge points, and conduct soil percolation (perc) testing. This determines your soil's drainage capacity and confirms whether your ground requires a sub-surface drainage field or can support direct discharge into a local watercourse under Environment Agency rules.
2. System Sizing & Regulatory Compliance: Population Equivalent (PE) calculation.
We calculate your property’s exact Population Equivalent (PE) based on potential bedroom occupancy to specify the correct plant capacity. We assess local environmental sensitivity—including National Park regulations, nitrate neutrality zones, and chalk stream protections—to ensure your specified system satisfies the .GOV General Binding Rules.
3. Excavation & Structural Groundworks: Excavation & anti-flotation anchoring.
Our in-house groundworks team prepares the installation pit using specialized excavation machinery to minimize garden disruption. To prevent tank displacement or floating during high winter water tables, we anchor the unit securely within a concrete or pea-gravel backfill surround based on groundwater conditions.
4. Pipework & Electrical Commissioning: Electrical commissioning & aeration setup.
We connect the household soil drainage pipes to the plant inlet and install the treated effluent outlet. Our qualified engineers run armored electrical ducting, wire the internal air blower and continuous monitoring alarms, and test airflow rates to ensure the mechanical aeration process operates efficiently.
5. Reinstatement, Building Control & Handover: Site reinstatement & compliance documentation.
We backfill the surrounding area, carefully reinstate your lawn or driveway surfaces, and run final operational tests. Once complete, we issue your full compliance handover pack, register the installation with local Building Control, and activate your warranties.
Contact us now for a FREE no obligation quote.
Frequently Asked Questions
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A standard residential sewage treatment plant installation typically takes between 3 to 5 working days from initial excavation to site reinstatement, depending on ground conditions, access, and weather.
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Ground excavation requires heavy machinery, but our in-house teams take extreme care to protect driveways and garden features. We lay protective ground mats where necessary and handle full site reinstatement upon completion.
Do I need Building Control approval for a new treat
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Yes. All new off-mains drainage installations and septic tank replacements require local authority Building Control sign-off or certification via an approved inspector. We handle all compliance filings and provide your certificate upon project completion.
Need Local Off-Mains Drainage Advice?
Speak directly to our local engineering team to book an initial site survey or discuss upgrading your existing septic tank.
Call us today on 01202 280423 or 0333 202 7129 for a free, no-obligation consultation.
