1. Recurring blockages in the same drain
If the same drain blocks again and again, a damaged pipe may be to blame, because debris catches on dents. A cleared blockage that returns within weeks suggests a fault in the pipe. Debris catches on dents and rough patches.
Cleaning only treats the symptom. A CCTV drain survey shows the cause. Because pitch fibre can change shape, the camera is the best way to check.
2. Progressively slower drainage across multiple outlets
Slow drains in several places can mean a shared pipe is narrowing, since all the fittings use it. The change may be gradual, so you may not notice it at first. Keep an eye on how fast sinks and baths empty.
Try a simple test. Fill the bath and watch how quickly it drains, then repeat once a month. Because the change is gradual, a note of the time helps you spot a slow decline.
Slow flow can also come from grease or roots. Therefore, a survey helps to find the true cause.
3. A CCTV survey report showing delamination or ovality
Delamination means the pipe wall peels in layers. Ovality means it has gone from round to oval. Both are signs of trouble.
If your report mentions either, ask what it means for repair. Our guide to drain relining explains one option. You can also read what to expect from a CCTV drain survey.
4. The property was built between 1945 and 1975
Many sources say pitch fibre was most common in homes from roughly this period, although dates vary. If your home dates from then, the drains may include it. Check the survey for the pipe material.
Age alone does not mean a fault. However, it is a reason to look. A survey gives you facts.
5. Subsidence or ground movement near drain runs
Moving ground can crush or shift a weak pipe, because the pipe has lost strength. Cracks in walls near a drain run may be a clue. Wet patches in the ground may show a leak.
Tell your insurer or a surveyor if you see signs of movement. A drain survey can show whether pipes have been affected.
What to do next
Book a camera survey if you see these signs, because it shows what is wrong. Keep the report. Then ask for repair options and compare them.
You can request a free quote and we will pass your details to a local drainage engineer. A CCTV drain survey is the best first step.
Related guides and local help
If you want to know more, read 7 Signs Your Restaurant Drain Needs a Maintenance Contract. You can also read Manhole Cover Replacement: Types, Load Ratings and Costs and Septic Tank Maintenance: A Complete Guide for UK Homeowners, because they cover closely related problems.
These guides help too: Landlord Drainage Responsibilities: What UK Landlords Do, Soakaway Problems: Why They Fail and What to Do About It, Home Insurance and Drainage: What Is Covered and What Is Not, 10 Hidden Plumbing Problems in Victorian Homes to Look For and 6 Things That Can Void Your Home Insurance Drainage Claim. Each one explains a related topic in plain English.
Need help near you? Read our drain jetting page first, or see Drain Jetting in Bishop Auckland and Drain Jetting in Bishops Stortford. You can also see Blocked Drains in Crawley, since every service page has a free quote form. We pass each request to a local drainage engineer.
