What it involves? 

Establishing the volume and velocity of flow-in drain and sewer systems at different times; in particular, focusing on peak flows normally associated with extreme weather events.  This information is vital for both design (current hydraulic capacity: adequate, too low, over-sized?) and for repair installation consideration.

Should there be problems with corrosion, mortar or other degradation, it is necessary to know the nature of the effluent the pipe is carrying.  This will include PH level, temperature and chemical composition e.g. issues such as high calcium or corrosive dissolved substances.  A sampling pattern is needed to capture the range of effluents.

Our service

Flow monitors come in many forms, the most effective of which is a continuous monitor with telematics that send results to a monitoring station on an ongoing basis.  They can be fitted in the crown or base of a pipe as appropriate for the sediment levels.

Effluent sampling requires manual samples, ideally in a physical and time distribution that will enable peak effects to be captured.

Our Process

Flow monitoring

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

Effluent sampling

  • Determine the appropriate locations, times and test specifications
  • Arrange safe access to the relevant 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.

Why Choose Us from Flow Monitoring and Effluent Sampling


We possess considerable experience in resolving pipe damage and addressing degradation problems to enable a long-term solution for clients. If we can be involved from the outset, we can assess all variables which contribute to the damage and degradation allowing for a more robust customer-focussed 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


All the skills needed to design and install rehabilitation solutions are relevant to flow monitoring and effluent sampling – from safe access of chambers, to installation of products and use of high tech equipment in sewers.  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.