Internal Pipe Swabbing Services: Restore Optimal Pipeline Performance
Pipe Testing Services (PTS) provides expert internal pipe swabbing services across the UK, a proven and highly effective method for cleaning the interior of water pipelines. Also known as line pigging, this process involves propelling a specialised cleaning device called a “pig” through the pipeline to mechanically scrape and dislodge build-up, scale, biofilms, and other accumulated materials from the pipe walls.
By leveraging state-of-the-art swabbing techniques, we help water utilities, industrial clients, and property managers restore optimal flow rates, reduce pumping pressures, and improve overall system performance and water quality.

Why is Internal Pipe Swabbing Important?
Over time, sediment, mineral scale, and biofilms can accumulate inside pipes, causing a significant reduction in water flow, pressure, and quality. Internal pipe swabbing is a critical preventative maintenance task because it directly addresses these issues, offering numerous benefits for pipeline efficiency and regulatory compliance. Ultimately, this proactive cleaning is a vital first step before conducting our Chlorination Services on existing mains, helping to avoid costly repairs and ensure water safety.
The Benefits of Pipe Swabbing
Improved Water Quality
Swabbing is essential for maintaining high water quality standards. Biofilms – aggregations of microorganisms that adhere to the interior surfaces of water pipes – can degrade water quality and pose health risks. By mechanically removing these biofilms and other contaminants, swabbing helps to maintain microbiological control. Furthermore, ensuring a clean pipeline is a crucial step towards compliance with stringent UK water quality regulations, such as:

- The Water Supply (Water Quality) Regulations 2016: These regulations set the standards for the quality of water supplied for drinking, cooking, and other domestic purposes.
- Drinking Water Inspectorate (DWI) Standards: The DWI oversees public water supplies, enforcing standards and providing guidance on how drinking water is regulated and tested.
Restored Flow Rates, Reduced Pumping Pressure & Extended Pipeline Lifespan
Effectively cleaning a pipeline’s interior delivers significant operational advantages:
- Restored Flow Rates: Swabbing effectively dislodges deposits that have accumulated over time, restoring the pipe's original diameter. This is crucial for maintaining the hydraulic capacity of the network and ensuring consistent water pressure for daily operations. For more detailed analysis of flow, explore our Flow Surveys.
- Reduced Pumping Pressures: By removing restrictions and reducing friction, swabbing allows water to move more freely, which can significantly lower the energy required for pumping and reduce operational costs.
- Extended Pipeline Lifespan: Removing corrosive deposits and preventing under-deposit corrosion can help to maintain the structural integrity of the pipeline, extending its operational life and deferring the need for costly replacements.
The PTS Internal Pipe Swabbing Process
Our specialists carry out a comprehensive evaluation and an operational process to guarantee thorough cleaning without inflicting damage on the pipeline.
Step 1: Pipeline Assessment
Our process begins with a comprehensive evaluation of the pipeline. We consider factors such as pipe material, diameter, length, age, and known operational issues to ascertain the most effective swabbing strategy and select the appropriate pig.
Step 2: Equipment Selection and Preparation
Utilising the insights from the assessment, we select specialised pig designs and equipment. Our pigs are crafted from robust materials like polyurethane or metal, tailored for varying levels of cleaning, from soft deposit removal to hard scale scraping.
Step 3: The Swabbing Operation
The selected pig is inserted into the pipeline and propelled by water pressure. The operation is closely monitored, with our skilled technicians using specialised equipment to regulate water pressure and flow rates. This allows us to track the pig’s progress and optimise the cleaning effectiveness in real-time.
Step 4: Post-Swabbing Flushing and Testing
After the swabbing run, we conduct an exhaustive flushing and testing regimen. This process verifies that the dislodged debris has been completely removed from the pipeline and that the system conforms to all established water quality standards.
Step 5: Data Logging and Reporting
We diligently record critical parameters such as pig speeds, pressures, and operational data. Upon completion, we compile comprehensive reports that aid in future maintenance planning and ensure compliance with regulatory standards.
Applications of Pipe Swabbing
Our equipped and experienced teams manage a diverse array of water pipe cleaning projects across the UK, including:
- Water Main Swabbing: Comprehensive swabbing services for municipal water mains, essential for ensuring a reliable and high-quality water distribution network.
- Pre-Chlorination Swabbing: Cleaning existing mains before disinfection to ensure the chlorine can work effectively on the pipe surface itself.
- Post-Construction Swabbing: Removing construction debris, dust, and other contaminants from newly installed pipelines before they are commissioned.
Case Study: HS2 Water Infrastructure Swabbing
Pipe Testing Services (PTS) ensured the integrity of water infrastructure for the HS2 high-speed rail project, working closely with NetworkPlus. Our comprehensive approach included a thorough swabbing process to remove debris and contaminants from a 100m 450mm ductile iron main, ensuring a pristine environment for subsequent testing and disinfection treatment. Take a look at the full case study.
Factors Influencing Swabbing and
Chlorination Service Costs
The cost of our swabbing and subsequent chlorination services can vary depending on several factors. We believe in offering transparently customised solutions based on:
- Pipeline length and diameter
- Degree of build-up or contamination
- Accessibility and location of the pipeline
- Any additional specialised equipment or techniques required
By considering these factors, we can accurately estimate the time, resources, and personnel required. We encourage you to contact us for a detailed quote tailored to your specific project requirements.
Trust PTS for Comprehensive Pipeline Solutions
At PTS, our expertise spans a wide range of advanced techniques and methodologies, offering holistic solutions that enhance the safety, efficiency, and longevity of your water infrastructure. Beyond swabbing, we provide a full suite of services, including:
- Legionella Contractors: Full risk assessments, testing, monitoring, and remediation.
- Pipe Fusion Welding: Specialised techniques for joining plastic pipes.
- UKAS Water Sampling & Monitoring: Accredited sampling for reliable quality analysis.
- Clean Water CCTV Surveys: Visually inspect the condition of water mains and pipelines.
- Internal Pipework Chlorination: Controlled disinfection to treat and sanitize internal water systems.


Choose PTS for Professional Swabbing Services
Pipe Testing Services is your trusted partner for professional water pipe cleaning and swabbing services across the UK. With nationwide coverage, state-of-the-art equipment, and highly trained technicians, we deliver exceptional solutions tailored to your water distribution system’s needs.
Contact us today to discuss swabbing, schedule a consultation, or request a quote.
- Phone – 01922 451646
- Email – enquiries@pipetestingservices.co.uk
- Address – Unit 27 Birchbrook Industrial Estate, Shenstone, Lichfield, Staffs, WS14 0DJ


Pipe Swabbing (FAQs)
How often should pipelines be swabbed?
Frequency depends on water quality, flow rates, pipeline age, and other factors. Our experts provide tailored recommendations based on your system’s specific requirements.
Can swabbing damage pipelines?
When performed by trained professionals with the correct equipment, the risk of damage is minimal. PTS carefully selects the pig type and density to match the pipe material and condition, ensuring a safe operation.
Is swabbing suitable for all pipe materials?
Swabbing is suitable for most common pipe materials, including ductile iron, PE, and PVC. The specific pig design and material are chosen to be compatible with the pipe.
Can swabbing be combined with other techniques?
Absolutely. Swabbing is often combined with other services such as CCTV pipe surveys to assess cleanliness, and it’s a critical preliminary step for Chlorination Services.
How long does the swabbing process take?
The duration varies based on the length and condition of the pipe, but it is generally a quick and efficient process designed to minimise system downtime.