Start with the symptoms
The pattern of the problem can help distinguish a local fixture issue from one further along the drainage run. A sink that drains slowly may be affected by its trap or waste pipe, while multiple fixtures backing up can indicate a blockage in a shared or main run.
Make a note of which fixtures are affected, whether an external gully is overflowing, when the issue began and whether it has happened before. This information is useful when discussing the situation with a drainage professional.
- One fixture affected: check the local trap or waste pipe
- Several fixtures affected: explain the pattern and any backups
- Overflowing drain or manhole: avoid further water use where possible
- Recurring problem: consider whether a camera inspection is needed
Matching the service to the problem
Drain unblocking and jetting are clearance options for restrictions and deposits. A CCTV survey is often helpful when the problem recurs, the pipe condition is unknown or a repair decision is needed. Repair and groundworks scopes are then based on the evidence from inspection, access and the condition of the pipe.
No single approach is right for every issue. The available access, pipe material and the nature of the blockage all affect what can be done safely and effectively.
- Drain unblocking: local or accessible restrictions
- Drain jetting: suitable deposits and stubborn blockages
- CCTV survey: recurring issues, property questions and repair planning
- Drain repair: verified pipe defects
- Groundworks: external drainage installation or alteration
Questions to ask before authorising work
Ask what has been observed, what method is proposed, how access affects the scope and what follow-up might be needed. If a price or timescale is important, ask for the agreed scope in writing and make sure it separates investigation, clearance and any repair.
For a severe overflow, sewage backup or potential safety issue, avoid the affected fixtures and contact a drainage professional promptly. If you are unsure whether a problem is in a private drain or public sewer, the relevant water company may also be able to advise.
- What is the likely cause based on the initial assessment?
- What access point and equipment will be used?
- Is camera inspection advisable before or after clearance?
- What is included in the quotation and what could require further approval?
Frequently asked questions
What drainage information should I provide when calling?
Describe the symptoms, postcode, affected fixtures, visible overflow and any access restrictions. Share previous reports or survey footage if available.
When should I request a CCTV drain survey?
It can be helpful for recurring blockages, property decisions, suspected pipe damage and repair planning.
Can all drain repairs be completed without excavation?
No. Some defects may be suitable for internal repair or relining, while other pipe failures can require excavation. An inspection helps determine the options.