What it involves?

Flow and effluent monitoring shows the size and speed of flow-in drain and sewer systems, focusing on peak flows following extreme weather events. This information helps with both design (i.e. current hydraulic capacity) or see if repairs are needed .

If there are problems with corrosion, we have to know the nature of the effluent the pipe carries. This will include PH level, temperature and chemical composition e.g. issues such as high calcium or corrosive dissolved substances. A sampling pattern will let us know the range of effluents. Flow and effluent monitoring comes in many forms. The most effective of which is a continuous monitor that send results to a monitoring station. The monitor is fitted in the crown or base of a pipe as appropriate for the sediment levels. Effluent sampling requires manual samples. Ideally taken in a physical and time spread that will enable peak effect capturing.

Our service

Flow monitoring

  • Select the technique and equipment to be used.
  • Determine locations to capture the relevant flows.
  • Arrange safe access to the chambers.
  • Install the monitors and data loggers, calibrate and test.

Effluent sampling

  • Determine locations, times and test specifications.
  • Arrange safe access to the chambers.
  • Take samples, record in-situ readings including temperature, seal samples and submit to accredited laboratory.
  • Present results with relevant benchmarks.


  • Access permission from relevant land and property users & owners.
  • Safe chamber access.
  • Sampling patterns, locations and frequencies.
  • Monitor and test specifications.

What You Gain from Flow Monitoring and Effluent Sampling

At the outset design information to enable you to model the network and make appropriate design decisions.  In respect of rehabilitation solutions, flow data can help you determine the most appropriate solution used and what if any over-pumping and tankering may be required to enable survey and installation.

Effluent sampling can be used to determine the root cause of unexpected degradation and even identification of process failures in industrial plants or illegal discharges into your network.  For rehabilitation solutions, this data can be used to ensure the chosen product has the relevant temperature and chemical resistance.

How we can help

We are experienced in resolving pipe damage and addressing degradation problems to enable a long-term solution for clients. If we can are involved from the outset, we can assess all problems swiftly allowing for a more robust customer-focused solution. Whether it is implementing the customer’s own designed survey or working with customers to define the appropriate methodology, we will collaborate to derive the information our customers require. We have experienced supervisors leading projects for customers whilst our highly trained teams can execute all elements of the work to ensure completion. In this area we work very closely with our equipment suppliers, accredited testing companies and laboratories. Technology is moving rapidly in this area so we rely on our partners to keep us informed of the best techniques and equipment to deploy on site in addition to the provision of training in these new applications.