Drain Jetting London — High-Pressure Clearance

Drain jetting (high-pressure water jetting) uses water pressurised to 1,500–4,000 PSI through a flexible hose with a specialised nozzle. The nozzle has forward-cutting jets (to break up the blockage) and rear-facing jets (which propel the hose forward and flush debris back towards the access point). Unlike rods, which push the blockage further down the drain, jetting removes the material from the pipe entirely. It also cleans the pipe walls — grease and scale that have accumulated over years are cut away, not just displaced.

DIY chemical drain unblockers work on fresh, soft grease blockages in the first metre of a waste pipe — they're ineffective on total blockages, blockages more than 1–2m from the drain opening, or anything involving scale, roots or broken pipe fragments. If water is backing up completely or draining extremely slowly despite chemical treatment, jetting is the correct solution. In London's older drainage systems, chemical descalers are rarely sufficient because the scale is hard calcium/silica deposit rather than organic grease.

Domestic drain jetting starts from £150 for a standard household drain clearance. External sewer jetting is typically £200–£350 depending on drain length. Commercial kitchen drain jetting (FOG clearance) starts from £250. All prices include the jet clearance and a verbal confirmation that the drain is running clear. A CCTV survey to locate blockages before jetting and confirm clearance afterwards is an additional £150–£250. We provide written quotes before starting for larger commercial jobs.

Standard high-pressure jetting is safe for PVC, HDPE, cast iron, and vitrified clay pipes in good condition. The water pressure is controlled to match the pipe material and condition. The one exception is very old, already-cracked earthenware drain sections — jetting can dislodge fragments from already-failing pipes. This is exactly why we recommend a CCTV survey before jetting on Victorian properties or any drain with a history of recurring blockages: it lets us identify fragile sections before applying pressure.

Rods are rigid sections screwed together and pushed manually into the drain — they displace blockages by physical force, pushing them either free or further down the pipe. They're effective on soft blockages close to the access point but can't remove grease deposits from pipe walls. Jetting uses water pressure to cut through and flush out blockages, and simultaneously cleans the pipe wall surface. Jetting takes more time to set up but provides a far more thorough clearance — essential for recurring blockages where grease is coating the pipe walls.

Yes — root-cutting jetting nozzles (chain flail and rotary cutter heads) cut through fine root intrusion and remove it from the drain. However, jetting only removes the roots currently in the pipe — it doesn't prevent regrowth. If roots are entering through a cracked or offset joint, the joint needs repair (excavation or pipe-lining) or the roots will return within 1–3 years. A CCTV survey after jetting will show whether the root entry point (the joint) needs attention.

A standard domestic drain jetting job takes 1–2 hours including setup, clearance, and a post-jet flow test. Commercial sewer jetting on longer drain runs may take 2–4 hours. We carry 100m+ of hose, so most London residential drain runs can be fully jetted from a single access point. If the drain has multiple bends or lateral connections, jetting time increases.

Domestic drains don't need scheduled jetting unless you've had recurring blockages. Most London households find jetting every 3–5 years is sufficient to keep drains clear. Commercial kitchens are different — FOG (fats, oils, grease) accumulation in commercial drain lines typically requires jetting every 3–12 months depending on volume and menu type. We can advise on the right schedule based on your drain configuration and usage.

Yes. We can carry out a CCTV survey before jetting (to identify blockage cause and pipe condition), after jetting (to confirm clearance and check for pipe damage), or as a standalone service. Our CCTV units are compatible with drain diameters from 50mm to 300mm and can navigate multiple bends. We provide a written report with video footage — useful for insurance claims or pre-purchase drainage surveys.

Recurring blockages in the same location usually indicate a structural issue rather than just grease or debris accumulation. Common causes: an offset joint where the pipe has subsided — creating a ledge that catches debris; a partial root intrusion that wasn't fully removed in a previous jetting; a section of collapsed pipe that catches solid material. A CCTV survey after your most recent blockage would identify the cause. In many cases, pipe lining (cured-in-place pipe lining, CIPP) can repair structural issues without excavation.