Drainage Unblocking Services

A blocked drain can cause serious disruption to your home, business or managed property. Wastewater backing up, foul smells, slow draining toilets and overflowing drains are all signs that your sewer system may need professional attention.

At DASA, we provide specialist sewer and drainage unblocking services for residential and commercial properties across the UK. With over 40 years of drainage experience, our engineers use professional equipment, proven drain unblocking methods and CCTV drain technology to find the cause of the problem and restore wastewater flow safely.

We support homeowners, landlords, property managers, businesses and insurers with sewer unblocking, drain repairs and planned maintenance. Based in Hazel Grove, Stockport, we work nationwide through a network of local drainage engineers, helping customers access expert support wherever they are based.

What Causes a Sewer Blockage?

Sewer blockages can happen for several reasons. Some build up gradually over time, while others appear suddenly and cause immediate disruption. Finding the cause helps us recommend a longer-term solution, rather than only clearing the immediate blockage.

Common causes of blocked sewers include:

Fat, oil and grease building up inside the pipework
Wet wipes, sanitary products and other non-flushable items
Tree root ingress
Collapsed or damaged sewer pipes
Ground movement affecting underground pipework
Scale, silt and debris collecting inside the sewer
Poor installation or damaged pipe joints
Heavy use in commercial or multi-occupancy buildings

A quick surface-level fix may clear the blocked sewer temporarily, but it may not solve the underlying drainage problem. If the same problem returns, there may be damage, root ingress or a structural fault inside the pipe. Our engineers can investigate the cause and recommend the right sewer unblocking, blocked drains support or repair service for your property.

Signs You Need Drainage Unblocking

A blocked sewer often creates several warning signs before the problem becomes severe. Acting early can reduce the risk of flooding, property damage and repeated drainage issues.

You may need sewer unblocking if you notice:

Toilets taking longer than usual to clear
Wastewater backing up into toilets, sinks, baths or showers
Gurgling sounds from drains or plugholes
Bad smells inside or outside the property
Water pooling around manholes or drains
Multiple drains blocking at the same time
Overflowing external drains
Recurring blockages after previous drain cleaning

If several drainage points are affected at once, the issue may be deeper within the sewer system rather than a single blocked sink, toilet or shower. We can assess the problem, clear the blockage and check the condition of the sewer line.

Professional Drainage Unblocking Using Specialist Equipment

We use advanced drainage equipment to clear sewer blockages safely and effectively. The method we use will be based on the location, severity and cause of the sewer blockage.

Our sewer unblocking services may include high-pressure water jetting, mechanical blockage removal, CCTV drain surveys, pipe tracing and further repairs where needed.

High-pressure water jetting is often used to break down and remove blockages caused by grease, scale, silt, debris and other build-ups. It allows our engineers to clear the sewer line without unnecessary excavation.

Where the cause of the blockage is not clear, a CCTV drain survey can be used to inspect the inside of the pipework. This helps us identify issues such as cracks, root ingress, displaced joints or collapsed sections. Once the problem has been found, we can explain the most suitable repair or maintenance option.

Sewer and Drainage Unblocking for Homes

A blocked sewer or drain at home can be stressful, unpleasant and difficult to manage without professional support. Wastewater backing up into toilets or drains can quickly affect hygiene and cause damage if left untreated.

We help homeowners with sewer unblocking, drain cleaning, CCTV drain surveys and drain repairs. Our engineers work carefully to locate the blockage, clear the sewer line and help prevent the same issue from returning.

We can also support homeowners with related drainage services, including blocked drains, leak detection, pipe tracing, septic tank services and general drainage maintenance. This means you can access a complete drainage service through one experienced team.

Sewer Unblocking for Landlords and Property Managers

For landlords and property managers, a blocked sewer can affect tenants, damage property and create urgent maintenance issues. Fast action is often needed to protect the building and keep disruption to a minimum.

We work with landlords, letting agents and property management companies across the UK. Our team can attend reactive drainage issues, investigate recurring sewer blockages and provide drain maintenance for properties with ongoing drainage needs.

We can also provide clear reporting to support maintenance records, insurance communication and future repair planning. This is especially useful for managed properties, commercial premises and larger portfolios where drainage issues need to be recorded and resolved efficiently.

Commercial Sewer Unblocking

Businesses need drainage systems that work reliably. A blocked sewer can affect staff, customers, tenants and daily operations. For some sites, drainage failure can also create health and safety concerns.

We provide commercial drainage services for a wide range of premises, including offices, retail sites, hospitality businesses, industrial units, care settings, schools, managed buildings and multi-site portfolios.

Our commercial sewer unblocking service can help clear urgent blockages, reduce disruption and support the safe operation of busy sites. We also offer planned drainage maintenance contracts, helping businesses reduce the risk of repeat blockages and emergency callouts.

CCTV Drain Surveys for Recurring Sewer Blockages

If your sewer keeps blocking, clearing it again may only provide a temporary fix. A CCTV drain survey allows us to see inside the pipework and identify the cause of the recurring issue.

CCTV surveys can detect:

Tree root ingress
Cracked or fractured pipes
Collapsed pipe sections
Displaced joints
Scale and debris build-up
Poor pipe alignment
Signs of wear or previous damage

After the survey, we can explain the findings and advise on repair options. This may include targeted drain repairs, cleaning, patch lining or further investigation, depending on the condition of the pipework.

Sewer Problems Linked to Leaks or Damaged Pipework

Some sewer issues are linked to wider underground drainage or water problems. If there are damp patches, unexplained water pooling, ground movement or signs of escaping water, further investigation may be needed.

We also provide leak detection services to help locate hidden leaks and understand how they may be affecting the sewer or drainage system. This can be useful when drainage symptoms are unclear, when damage appears away from the blockage, or when an insurance claim requires clear evidence.

By connecting sewer unblocking with investigation and repair services, we can help customers understand the full cause of the issue rather than only dealing with the immediate blockage.

Private Sewer and Drainage Unblocking and Responsibility

Many sewer and drainage blockages relate to private drainage systems within the boundary of a property. We provide sewer unblocking for residential and commercial properties, but we do not carry out street sewer work.

If you are unsure whether the blockage is within your private drainage system or part of the public sewer network, our team can help assess the situation and advise on the next step.

Speak To DASA About Sewage Problems

If you have a blocked sewer, slow draining toilets, bad smells or wastewater backing up, professional sewer unblocking can help protect your property and restore your drainage system.

Call 0800 142 2783, email advice.team@dasa.co.uk, or contact us online to arrange expert support from our team. Whether you are dealing with a problem at home, managing a portfolio of properties or overseeing a commercial site, we are ready to help you take control of the issue before it gets worse.