--- title: "Drain Jetting vs Drain Rodding: Which Method Do You Need?" canonical: "https://drainunblockerlondon.co.uk/blog/drain-jetting-vs-drain-rodding/" pubDate: 2026-02-08 author: John Hanson description: "Drain jetting and rodding are different tools for different jobs. Our London engineers explain when each method works, how they combine, and what yours will cost." tags: [drain jetting, drain rodding, blocked drains, London, drain unblocking] categories: [Drain Advice] --- When you call a London drainage company about a blocked drain, the engineer will usually arrive with both rods and jetting equipment. The choice of method isn't arbitrary — each one is appropriate for different types and severities of blockage, and using the wrong tool can either fail to clear the blockage or, in some cases, make the problem worse. Here is what each method involves, when it works best, and how to know which one you actually need. ## What Is Drain Rodding? Drain rodding uses a series of flexible rods — typically 1-metre sections screwed together — inserted into the drain and pushed manually to physically break up or dislodge a blockage. An engineer feeds the rods into an inspection chamber or access point and rotates them clockwise to engage the clog and pull it apart or push it through. Rodding is a mechanical process. It relies on physical force applied directly to the blockage, which makes it highly effective for solid, well-defined obstructions — a clump of wet wipes, a compact ball of hair, or a solid grease plug near the top of the drain run. Because it uses no water pressure, it also carries no risk of dislodging weak pipe joints if the engineer works carefully. Rodding is typically faster and cheaper than jetting for simple, recent blockages. Most engineers will attempt rodding first because, if it works, it resolves the problem without the setup time jetting requires. ## What Is High-Pressure Drain Jetting? Drain jetting uses a flexible hose with a specialist nozzle, fed into the drain and pushed through by water pressure delivered at between 2,000 and 4,000 PSI. The nozzle rotates while jets of water blast the pipe walls, cutting through accumulated grease and fat, breaking up root intrusions, and flushing all debris downstream. Unlike rodding, jetting cleans the pipe walls rather than just clearing a passage. A rodded drain may be technically clear but still have a 20mm crust of grease on the pipe wall — a drain that has been jetted is clean. This matters for ongoing performance: a clean pipe is significantly less likely to re-block within weeks. ![Engineer feeding a high-pressure jetting hose into a drain inspection chamber in a London back garden, professional equipment, overcast daylight](/images/blog/drain-jetting-vs-drain-rodding/drain-rod-inspection-chamber-inline.webp) ## When Rodding Works Best Rodding is the right first response for: - **Acute blockages** — the drain was working yesterday and is now completely blocked, suggesting a discrete obstruction rather than progressive buildup - **Kitchen drain blockages close to the property** — where the blockage is accessible and well-defined - **Toilet blockages** — where the obstruction is typically solid material caught in the S-bend or soil stack - **Emergency callouts where time matters** — rodding can be deployed and effective in minutes The limitation of rodding is that it cannot clean pipe walls, and it cannot clear root intrusions that have grown into the pipe bore. If the blockage is caused by roots or compacted silt, rodding will make a temporary passage but the blockage will return. ## When Jetting Is the Better Choice High-pressure jetting is required for: - **Recurring blockages** — if the same drain blocks every few weeks, the pipe wall is heavily coated and rodding is only providing temporary relief - **Grease and fat accumulation** — cooking fat solidifies on pipe walls and resists rodding; jetting cuts through and flushes it - **Root intrusions** — roots that have grown into the pipe bore cannot be dislodged by rods; jetting cuts and flushes them - **Partial blockages with slow drainage** — where the pipe is not completely blocked but water is draining slowly, jetting restores full flow - **Post-survey clearance** — after a CCTV survey identifies a specific blockage point, jetting clears it precisely For London properties with Victorian clay pipes, jetting is almost always the definitive solution because the pipe walls accumulate silt and grease over decades. Rodding gives temporary relief; jetting restores actual pipe capacity. ## Can They Be Combined? Yes, and frequently are. A common approach is to rod first to create a passage and restore basic drainage, then jet to clean the full pipe bore. This is particularly effective where a pipe is completely blocked — jetting into a full pipe is less efficient, so rodding creates an opening and jetting finishes the job. For CCTV surveys conducted after a clearance, engineers will often jet first and then camera the pipe, since a clean pipe gives a clearer image and allows accurate assessment of any structural issues. ## Cost Comparison Drain rodding in London typically costs £80–£150 for a standard callout, depending on access and severity. High-pressure jetting costs £120–£250 for a residential run. If both methods are used in sequence, most companies charge a single combined rate rather than two separate callouts. Emergency rates (out of hours, weekends) are typically 40–60% higher for both methods. Our [drain jetting service](/services/drain-jetting/) covers all London postcodes. If you are not sure which method your blockage requires, an engineer can assess on arrival. For pricing detail, see our [drain jetting cost guide](/pricing/drain-jetting-cost/). ## Frequently Asked Questions ### Is jetting safe for old Victorian drain pipes? In most cases, yes. Modern jetting equipment is calibrated for residential drain pipes, and the pressure applied is not sufficient to damage sound clay or cast iron. However, if a CCTV survey has identified cracked or severely displaced pipe sections, very high pressure directly at those points should be avoided. An experienced engineer will adjust pressure accordingly. ### Can I hire a rod and do it myself? Drain rods are available from hire shops, and for a straightforward kitchen blockage close to the property, self-rodding is feasible. However, if the blockage is in a shared drain, if you cannot locate the access point, or if the drain is backing up with sewage, professional attendance is strongly advisable. Incorrect use of rods — particularly rotating counter-clockwise — can cause rods to unscrew and be lost in the drain. ### How long does jetting take? A standard residential drain jetting visit takes 30–60 minutes, depending on pipe length and the nature of the blockage. More complex runs, or pipes requiring multiple passes, may take up to 90 minutes. ### Will rodding damage my pipes? Rodding applied correctly to sound pipes does not cause damage. Excessive force against a severely cracked pipe section can worsen an existing crack, which is one reason a CCTV survey is valuable before intensive intervention on older pipes. Call [0204 593 7845](tel:02045937845) for same-day drain jetting and rodding across Greater London. Our [drain unblocking service](/services/drain-unblocking/) covers all 32 boroughs, and our vans carry both rods and jetting equipment for rapid assessment on arrival.