--- title: "External Drain Unblocking | Northstar Plumbing" description: "Clear blocked outside drains and gullies quickly and safely. Restore normal flow, reduce odours and overflow, and pinpoint the cause." canonical: "https://www.northstarplumbing.co.uk/services/external-drain-unblocking" --- ![Worker in red hard hat and orange cat peering into open manhole with flashlight](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fworker-cat-open-manhole-flashlight.jpg%3Fv%3D1768575124081&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ) Drainage & Blockages # External Drain Unblocking [Contact Us](https://www.northstarplumbing.co.uk/redirect) External drain unblocking clears blockages in outside drains and gullies so wastewater can flow away properly. It is the right service when you have slow drainage, pooling water, unpleasant smells, or an overflowing gully. The aim is to locate the cause, remove the blockage using the safest effective method, and confirm the drain is running freely again. ## What external drain unblocking covers External drain unblocking is designed to restore normal drainage and reduce the risk of repeat issues. The service typically includes: - Locating the most likely point of restriction in outside pipework, gullies, or channels - Clearing the blockage using appropriate tools (for example rods or high-pressure jetting) - Removing built-up debris where accessible (silt, leaves, grease, wipes, food waste) - Checking flow after clearance to confirm the drain is running normally - Practical advice on what caused the issue and how to help prevent a recurrence ### When this service is most useful You may need external drain unblocking if you notice slow drainage from sinks or appliances, gurgling sounds, foul odours outdoors, or water backing up at a gully. It is also common after heavy rain when leaves and silt collect, or when a drain has not been used for a while. For landlords and small commercial sites, it can help resolve issues quickly and minimise disruption. ### What happens during the visit The work starts with a few checks to narrow down where the blockage is and what is likely causing it. The drain is then cleared using the most suitable method for the pipe size, access point, and type of obstruction. Once cleared, the flow is tested and the area is left tidy, with clear next steps if any further investigation is needed. ### After the drain is clear After normal flow is restored, you will be told what was found and what to watch for. If there are signs of a recurring problem, such as root ingress or a damaged section of pipe, you will be advised on options to address it. Simple preventative steps can often reduce future callouts, especially around what goes into sinks, toilets, and gullies. [Contact Us](https://www.northstarplumbing.co.uk/redirect) ## Frequently Asked Questions What counts as an external drain or gully? An external drain is the pipework outside your property that carries wastewater away. A gully is the outside pot or grate that collects water from appliances or rain runoff before it enters the drain. How quickly can normal drainage be restored? Many blockages can be cleared in a single visit once the access point is identified. Timing depends on how compacted the blockage is and how easy the drain is to reach. Will you need to dig up my garden or driveway? Most external blockages can be cleared through existing access points, such as a gully, rodding eye, or manhole. Excavation is only considered if there is a collapsed pipe or a defect that cannot be resolved from above ground. Can you unblock shared drains for flats or small commercial premises? Yes, external drain unblocking can be carried out on shared lines where access is available and it is clear which runs are affected. If responsibility is unclear, you can still have the blockage located and the next steps explained. How can I reduce the chance of another blockage? Avoid putting fats, wipes, food waste, and excessive paper into the drainage system. Keep gullies clear of leaves and silt, and act early if you notice slow drainage or smells returning. [Contact Us](https://www.northstarplumbing.co.uk/redirect) ## Related Services Complete your experience with these services - Waste Pipe Replacement [View](/services/waste-pipe-replacement) - Waste Pipe Repair [View](/services/waste-pipe-repair) - Trap Replacement [View](/services/trap-replacement) - Soil Stack Blockage Clearance [View](/services/soil-stack-blockage-clearance) Show more services - Slow Drainage Investigation [View](/services/slow-drainage-investigation) - Saniflo Service [View](/services/saniflo-service) - Root Ingress Investigation (Domestic) [View](/services/root-ingress-investigation-domestic) - Minor Drain Repair [View](/services/minor-drain-repair) - Manhole Inspection [View](/services/manhole-inspection) - Macerator Unblocking [View](/services/macerator-unblocking) - Macerator Repair [View](/services/macerator-repair) - High-Pressure Drain Jetting (Domestic) [View](/services/high-pressure-drain-jetting-domestic) - Gully Trap Clearance [View](/services/gully-trap-clearance) - Drain Rodding [View](/services/drain-rodding) - Drain Odour Investigation [View](/services/drain-odour-investigation) - Drain Maintenance (Domestic) [View](/services/drain-maintenance-domestic) - Blocked Waste Pipe Clearance [View](/services/blocked-waste-pipe-clearance) - Blocked Toilet Clearance [View](/services/blocked-toilet-clearance) - Blocked Sink Clearance [View](/services/blocked-sink-clearance) - Blocked Shower Drain Clearance [View](/services/blocked-shower-drain-clearance)