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Expert Drainage Specialists

Blocked drains, CCTV surveys, and emergency drainage repairs delivered fast across Cornwall and Devon by experienced engineers.

About This Service

Professional Drainage Services

Drainage problems can escalate from a minor inconvenience to a serious health hazard in a matter of hours. A blocked drain can cause wastewater to back up into your property, creating unpleasant odours, potential contamination, and costly water damage. NJG Construction provides rapid-response drainage engineers across Cornwall and Devon who carry specialist equipment to diagnose and resolve issues quickly.

Our drainage specialists use the latest technology including CCTV drain survey cameras to pinpoint the exact location and cause of blockages, collapses, and root ingress without the need for exploratory excavation. High-pressure water jetting is used to clear stubborn blockages caused by fat build-up, debris, and scale, restoring full flow to your drainage system.

Cornwall and Devon properties often have older clay pipe drainage systems that are susceptible to root damage, joint displacement, and ground movement. Our engineers are experienced in repairing and replacing damaged sections using both traditional excavation methods and modern no-dig patch lining technology, minimising disruption to your garden and driveways.

What We Cover

Drainage Services

Blocked Drain Clearing

Fast unblocking of internal and external drains using high-pressure jetting, electro-mechanical equipment, and manual rodding.

CCTV Drain Surveys

Camera inspection of your drainage system to identify blockages, cracks, root ingress, collapsed sections, and joint displacement without excavation.

Emergency Drainage

24/7 emergency response for sewage backups, overflowing manholes, and flooding caused by drainage failures at domestic and commercial properties.

Drain Repairs

Excavation and replacement of damaged drain sections, including cracked clay pipes, displaced joints, and collapsed runs.

High-Pressure Jetting

Industrial-grade water jetting to clear fat, grease, scale, and debris from drain lines, restoring full bore flow to your system.

Soakaway & Land Drainage

Installation and repair of soakaways, French drains, and land drainage systems to manage surface water and prevent waterlogging.

How It Works

Step 1

Raise your job

Enter your requirements online, call us, or send a WhatsApp. You'll get an instant job reference number for tracking.

Step 2

Quote & deposit

We provide a clear quote upfront. Once you approve and pay a small deposit, the job is dispatched to a qualified local engineer.

Step 3

Work completed & reviewed

Your engineer completes the job with a signed checklist. You can track progress online and leave a review when done.

Common Questions

Drainage FAQs

How do I know if my drain is blocked?
Common signs of a blocked drain include slow-draining sinks or baths, gurgling sounds from plugholes, unpleasant smells near drains or manholes, and in severe cases, wastewater backing up into your property. If you notice any of these symptoms, it is best to act quickly before the problem worsens.
Is a blocked drain my responsibility or the water company's?
Generally, you are responsible for drains within the boundary of your property. Shared sewers and drains beyond your boundary are typically the responsibility of your water company (South West Water in Cornwall and Devon). If the blockage is on the shared sewer, we can help you report it to the water company. If it is on your private drain, our engineers will resolve it directly.
What causes drains to block?
The most common causes are fat, oil, and grease poured down kitchen sinks, wet wipes and sanitary products flushed down toilets, hair and soap build-up in bathroom drains, and tree root ingress through cracked or displaced pipe joints. In older Cornwall properties, clay pipes are particularly susceptible to root damage.
Do you offer CCTV drain surveys for house purchases?
Yes. Pre-purchase CCTV drain surveys are one of our most requested services. We provide a detailed report with footage showing the condition of the drainage system, which can highlight potential issues before you commit to buying a property. This is especially valuable for older properties across the region.
How quickly can you attend a drainage emergency?
For emergency drainage call-outs such as sewage backups and flooding, we prioritise rapid attendance and aim to have an engineer on site within 60 to 90 minutes across most of Cornwall and Devon. We carry jetting and CCTV equipment on our vehicles so we can start work immediately on arrival.

Need a Drainage Specialist?

Whether it is a blocked drain, a CCTV survey, or an emergency sewage backup, our drainage engineers are ready to help across Cornwall and Devon.

Raise a Job 07915 357552

Raise a Drainage Job

Fill in the form and we will match you with an experienced local drainage engineer. Emergency blockages and sewage issues are dispatched immediately.

  • Instant notification sent to available engineers
  • Emergency drainage jobs receive top priority
  • Engineers carry CCTV and jetting equipment
  • No obligation — free to submit a request

Prefer to call?

07915 357552 info@njgconstruction.co.uk

We'll contact you within minutes for emergency jobs, or within a few hours for standard requests.