Blocked drains in Balham: the usual causes
Balham is largely Edwardian and late-Victorian terraces and maisonettes, many split into upper and lower flats with separate kitchens stacked over one another. Rear extensions are common and often sit across the original drain run.
Most blocked drains build up over months rather than appearing overnight. Fat and detergent line the pipe wall, silt and grit settle in the low points, and wipes or roots catch on whatever is already there until the flow finally stops.
Upper and lower flat conversions produce a specific pattern: the ground-floor property sees the backing up first, even when the cause is a shared restriction further down. Establishing whose pipework is at fault matters as much as clearing it.
How we deal with blocked drains in Balham
We work from the symptom back to the cause rather than clearing the first chamber we find and leaving.
- Lift and inspect the chambers along the run to establish where the flow stops
- Confirm whether the fault sits inside the property boundary or on a shared or public sewer
- Clear the restriction with high-pressure water jetting at a pressure suited to the pipe
- Flush the run through and check the flow from every connected fitting
- Camera the cleared section where the cause is not obvious, so you know the condition of the pipe
Rear access is usually through the lower flat, so we arrange entry with both parties where the drain is shared. Camera evidence makes the conversation about responsibility much shorter.
Signs it needs attention now
- Water standing in an outside gully or rising from an inspection chamber
- Several fittings draining slowly at the same time, rather than just one
- Gurgling from a toilet or sink when a different appliance empties
- A drain smell outside that gets worse after rain or in warm weather
- Water backing up into a shower tray or bath at ground level
What we see most often in Balham
- Ground-floor flats seeing backing up caused by a shared restriction below
- Extensions built across the original rear drain run
- Kitchen waste from two stacked flats meeting in one undersized run
Balham is largely upper and lower conversion flats, and a good share of our work involves establishing which flat’s pipework is at fault. Camera evidence shortens that conversation considerably, especially where two leaseholders disagree.
Equipment and what happens afterwards
Our vans carry high-pressure jetting equipment with a range of nozzles, mechanical clearance rods for the situations where jetting is the wrong tool, and a camera with a locator so we can put a mark on the ground above a defect. Choosing between them matters: old clay pipework needs a different pressure from modern plastic, and a nozzle that clears a silted gully can damage a pipe that has already failed.
Once the line is clear we run water through it from every connected fitting rather than declaring the job done at the chamber. If the cause is not obvious, we say so and recommend a survey instead of guessing. You get a plain description of what we found, and if the pipe has an underlying fault you will hear about it from us before it becomes another call-out.
What blocked drains cost in Balham
Outside drain clearance is a fixed £144 plus VAT, with no call-out charge. You get a fixed price up front rather than an hourly rate, which means a difficult job in Balham does not become an open-ended one.
Areas we cover around Balham
Our Balham work covers SW12 and the rest of Wandsworth. Engineers are usually 60 to 90 minutes away, and because we also cover Clapham, Wandsworth, Merton and Wimbledon, a job that crosses a boundary does not need a second contractor.