24/7 Survey Service — South West UK
SEPTIC TANKSURVEYS.DORCHESTER.
Professional septic tank surveys across Dorchester, Dorset and the South West. CCTV inspection, drainage field assessment, and full written compliance reports. Solicitor-approved documentation within 48 hours.
Service Overview
Dorchester's Leading Septic Tank Survey Specialists
Based in Dorchester, Drain-Age provides professional septic tank surveys across the South West. Whether you're purchasing a rural Dorset property, renewing buildings insurance, or need to demonstrate compliance with the UK 2020 General Binding Rules, our CCTV-equipped engineers deliver accurate, detailed assessments you can rely on.
Rural properties throughout Dorset — from Poundbury and Charminster to Martinstown and Cerne Abbas — often rely on private drainage systems that require periodic professional inspection. Our engineers are fully trained, EA-registered, and NADC-approved, ensuring your survey meets the highest technical and legal standards.
Every septic tank survey we carry out in the Dorchester area is documented in a comprehensive written report, covering tank structural condition, inlet and outlet inspection, drainage field performance, and full General Binding Rules compliance status. Reports are issued within 48 hours and are accepted by solicitors, insurers and the Environment Agency.
What You Receive
What's Included in Our Survey
Every Drain-Age septic tank survey includes a full written report, system layout plan, and compliance certification — accepted by solicitors, insurers, and the Environment Agency.
Written Pre-Purchase Report
A comprehensive written septic tank inspection report covering system condition, compliance status, and recommendations — solicitor-ready within 48 hours.
System Layout Plan
A detailed layout plan showing the location of the tank, inlet/outlet pipework, drainage field, and all access points — essential for future maintenance.
Zone Protection Check
We check for any local drinking water abstraction zones and Source Protection Zones that may affect your system's compliance status.
Photographic Evidence
Full photographic documentation of the tank interior, pipework, drainage field, and any defects identified during the survey.
Remediation Advice
Where non-compliance or defects are found, we provide clear advice on required upgrades, alterations, or new drainage schemes.
Upgrade Cost Estimates
Transparent cost estimates for any remediation work needed to bring your septic tank or sewage treatment plant up to current standards.
The Survey Process
How Our Septic Tank Survey Works
Our engineers systematically inspect every component of your private drainage system — from the tank itself to the chambers, pipework, and drainage field. Each section is documented with a situation report and functionality conclusion, giving you a complete picture of your system's condition and compliance.
The Tank
We inspect the septic tank's structural condition, assess working levels, and check for root ingress, cracks, or signs of failure. The tank must meet effluent quality requirements — if it doesn't, you risk Environment Agency prosecution or fines.
- Structural integrity assessment
- Working level check
- Root ingress inspection
- Effluent quality evaluation
The Chambers
Inspection chambers exist where sections of drain meet. We inspect each chamber for residue build-up, post-installation additions, and signs of broken pipes or blockages. Soil residues indicate broken pipes; fat residues suggest likely blockages.
- Junction inspection
- Residue analysis
- Post-installation additions check
- Blockage detection
The Pipework
We CCTV all drain runs between chambers to identify damage or blockages. The most common damage is caused by ground movement creating displacement at joints, allowing roots to enter and damage pipework — repairs can be deceptively expensive.
- CCTV survey of all drain runs
- Joint displacement detection
- Root ingress identification
- Blockage location
The Drainage Field
We assess the soakaway and drainage field performance — critical for system longevity and compliance. Under the 2020 General Binding Rules, septic tanks discharging directly to surface water must be upgraded. We verify where your system discharges and its effectiveness.
- Soakaway performance testing
- Discharge point verification
- Percolation assessment
- GBR compliance check
How It Works
Our Process
Book Your Survey
Call 01305 854222 or submit online. We'll confirm a Dorchester-area engineer within the hour.
On-Site Inspection
Our engineer attends, inspects the tank, runs CCTV if required, and assesses drainage field performance.
Laboratory Analysis
Soil percolation tests and effluent samples are processed where required for full compliance checks.
Written Report Issued
You receive a solicitor-approved written report within 48 hours — ideal for home purchases or EA compliance.
FAQs
Septic Tank Survey Questions
Coverage Area
Serving Dorchester & The South West
Based in Dorchester, our engineers cover the full Dorset area and beyond — including all rural and off-mains properties.
Book Your
Septic Survey
Today
Dorchester-based engineers ready to survey your septic tank system across Dorset and the South West. 48-hour report turnaround. Full General Binding Rules compliance.