Drain blockages in Wandsworth: the usual causes
Wandsworth is classic late-Victorian terraced London, with long rows of family houses between the commons and a growing number of side-return and loft extensions. Those extensions frequently build over the original drain run, which changes how a blockage has to be reached.
A complete blockage is normally the end of a long process. The pipe has been narrowing for months, and one heavy load, a storm or a single unsuitable item finishes the job.
The River Wandle and the Thames both influence surface water here, and gardens are often paved or decked over former soakaways. The typical fault is a partly collapsed or root-affected clay lateral at the rear, showing up as a slow gully and a smell after rain.
How we deal with drain blockages in Wandsworth
An emergency call-out is not an excuse to skip diagnosis, so we still confirm the cause before we finish.
- Make the property safe and stop further discharge into the blocked run
- Locate the blockage by working through the chambers along the line
- Clear it with jetting or mechanical clearance, whichever suits the cause
- Prove the flow by running water through every affected fitting
- Report what caused it, and whether the pipe needs further attention
Rear gardens are usually reached through the house, so we protect floors on the way through. Where an extension covers the drain run, a camera survey is the quickest way to find the fault without lifting slabs.
Signs it needs attention now
- Waste water rising from a manhole or gully outside
- Nothing draining anywhere in the property
- Foul water backing up into a bath, shower or ground-floor toilet
- A strong drain smell inside the building
- Water pooling around an inspection cover after use, not just after rain
What we see most often in Wandsworth
- Root ingress at clay joints in rear gardens with mature planting
- Drain runs built over by side-return extensions, with no remaining access
- Rear gullies flooding where the garden has been paved or decked
Wandsworth is mostly family houses, and a large share of our work here follows an extension or a loft conversion. We also survey drains for buyers before exchange, which in this housing stock is money well spent.
Equipment and what happens afterwards
The vans are stocked for emergencies: jetting at a range of pressures, mechanical clearance, a camera and locator, and the protective equipment needed to work safely around foul water. Carrying all of it means the engineer who arrives can normally finish the job rather than book a return visit for the right kit.
We prove the flow before we leave, running water through every affected fitting rather than relying on the chamber clearing. We tell you what caused it and whether the pipe itself needs attention, and if the fault sits on a shared drain or a public sewer we say so plainly, because that is not a bill you should be picking up.
What drain unblocking cost in Wandsworth
Drain unblocking starts at a fixed £120 plus VAT, and there is never a call-out charge. Evenings, weekends and bank holidays carry no call-out charge, so an urgent job in Wandsworth costs what we quote.
Areas we cover around Wandsworth
Our Wandsworth work covers SW18, SW11, SW12 and SW17 and the rest of Wandsworth. Engineers are usually 60 to 90 minutes away, and because we also cover Battersea, Clapham, Balham and Putney, a job that crosses a boundary does not need a second contractor.