External drain unblocking covers all the drainage outside your home — gullies, manholes, chambers, and the pipe runs that carry waste and rainwater to the public sewer. These drains sit exposed to leaves, soil, moss, and tree roots, which build up over time. Since the pipes sit underground and out of sight, a problem often goes unnoticed until water pools in the garden.
We arrive with high-pressure jetting equipment for compacted blockages, plus drain rods and a CCTV camera for anything hidden. We clear the blockage, flush the full pipe run, and check the drainage for any structural issue that could cause trouble later.
External drain work typically takes one to two hours. The exact time depends on pipe length, access, and the type of blockage.
We identify all external access points — manholes, chambers, and gullies — and open them to check water levels. This helps us pinpoint the exact blockage location.
Our jetting unit feeds a high-pressure hose into the blocked section. As it progresses, it blasts through the obstruction and scours the pipe walls clean.
Where appropriate, we run a camera through the cleared pipe to check the blockage has gone. We also look for root ingress, cracks, or displaced joints while we're there.
We refit all access covers securely and clear any surface debris. We then advise you on the condition of your external drainage and any repairs worth considering.
The cost of external drain unblocking depends on the length of pipe affected and the type of blockage, since tree root clearance can mean extended jetting time. Request a fixed-price quote online; we confirm all pricing before starting and there is no call-out fee.
You are generally responsible for private drains within your property boundary. Since shared sewers and public drains beyond your boundary are Northumbrian Water's responsibility in the Darlington area, the blockage location matters. If it's in a shared or public sewer, we can advise you on how to report it to the water company.
Tree roots are one of the most common causes of external drain blockages in Darlington. Roots seek out moisture and can penetrate pipe joints and cracks, growing inside the pipe until they obstruct flow. Regular CCTV inspections help detect root ingress early before it causes a complete blockage.
For most residential properties, an annual external drain inspection and clean is sufficient. Properties with large trees near drainage runs, or those that have experienced previous blockages, may benefit from more frequent maintenance every six to twelve months.