Walk through Survey – what is it?
A Walk through survey is sometimes called an observational survey. It requires a team of highly trained and experienced Confined space Engineers. They must enter a sewer to visually assess the conditions of the sewer. It is an invaluable method of assessing the following.
- Condition of sewers
- Pipelines
- Cracks
- Corrosion
- Blockages, cross connections, etc

CES Team
- We are ISO 45001 for Health and Safety and ISO 14001 Environmental Management accredited
- Our team of Sewer Engineers all have completed Pipe Classification MSCC5
- All our Engineers have Confined space Training, Medium and High Risk.
- Our team are fully equipped with PPE and Confined space equipment, gas monitors, masks etc.
- We carry out Job specific Method Statement and Risk Assessments prior to the start of every Project.

Walk Through Survey FAQ
What is a walk-through drainage survey?
A walk-through survey involves trained technicians physically entering large-diameter sewers or culverts to inspect and document their condition. It is used where pipe diameter is too large for standard CCTV camera equipment.
Who needs a walk-through drain survey?
Walk-through surveys are typically required by local authorities, Irish Water, utilities companies and large construction contractors who need detailed structural assessments of major drainage assets.