Toilet drain blocked outside — inspection chamber full
Check the steps below first — if you\'re not confident, get it fixed safely today.
Find a Gas Safe engineer near you →⚠️ Do not attempt to clear a main drain blockage yourself with drain rods unless you are experienced — incorrect rodding can push the blockage further or disconnect pipe joints. Sewage is a biohazard; use PPE.
Not sure if this matches your problem?
Use our interactive tool — answer a few questions and get a personalised diagnosis.
Most likely cause & what to check
If the inspection chamber (manhole) in your garden is full or overflowing, the blockage is in the drain downstream of that chamber — between it and the sewer or the next chamber.
Check whether neighbouring properties are also affected — if they are, the blockage is in the sewer itself and is the water company's responsibility (call them; it is free).
If only your property is affected, the blockage is in your private drain. A drainage contractor with a high-pressure water jetting machine can clear 95% of blockages without excavation.
Do not flush anything further until the blockage is cleared — this will only worsen an overflow situation.
A drainage call-out in the UK typically costs £80–£150, with jetting an additional charge. CCTV survey to identify the cause costs £100–£250 extra but is worthwhile for recurring blockages.
This job needs a qualified engineer — post it now
Post the job and we'll match you with vetted local engineers. Free, no obligation.
Find a Gas Safe registered engineer near you and get it fixed properly.
Was this guide helpful?