Dartford sits where the River Darent runs out to the Thames, close to the Queen Elizabeth II Bridge that carries the M25 across the river. Water from homes on both sides of the valley heads towards the river through a patchwork of pipes: old clay runs beneath the terraced streets around the town centre, and smooth plastic pipework on the newer estates further out.
Both kinds of pipe gather dirt over time. Fat sets hard on the pipe wall, silt and grit settle at the joints, and wet wipes snag on anything rough and hold the rest in place. High pressure water jetting is often the quickest way to put that right without lifting a single paving slab.
A strong hose is fed into the drain through a manhole or rodding point. The nozzle on the end fires water forwards to break up the blockage and backwards to pull the hose along the pipe, scouring the inside as it goes. On clay drains it lifts out the grit and scale that build up at each joint. On plastic drains it washes away the soft, greasy coating that slowly narrows the bore until water can barely pass.
Vortex Plumbing & Drainage Ltd carries out drain jetting in Dartford for homeowners, landlords and businesses, as a one off clearance or as regular cleaning for drains that see heavy use. Our high pressure jetting page explains the method in more detail.
Jetting suits blockages a long way down the line, drains that keep slowing up again after rodding, and pipes lined with grease. Where a pipe is cracked or a section has dropped, jetting clears the way so a camera can see the damage properly, and a repair follows once we know what we are dealing with.
A toilet that fills to the rim and empties slowly, or gurgles when the bath drains, has a blockage somewhere between the pan and the drain outside. Finding out where comes first, because clearing a pan full of tissue is a very different job from clearing a blocked manhole two gardens away.
Wipes, sanitary items, cotton buds and too much paper in one go cause most toilet blockages. In older pans, hard water scale can narrow the outlet so that even normal use catches. We clear the pan and soil pipe with hand tools or a drain machine, flush through to prove it is running freely, and tell you plainly what caused it. Our blocked toilet page covers the usual causes and how to avoid them.
When a bath takes an age to empty, the trouble is nearly always close to the plughole: in the waste fitting, the trap beneath, or the short pipe that leads to the stack. Hair bound together with soap and conditioner forms a tangled mat that catches everything after it.
We take the trap apart where it can be reached, remove the blockage rather than pushing it further down, and check that the overflow is clear as well. We avoid harsh drain chemicals, which can damage older fittings and rarely shift a hair blockage completely. More on our blocked bath page.
Clay drains under older Dartford streets were laid in short lengths, and the joints between them can open as the ground shifts or as roots push in looking for water. Plastic pipes on newer homes rarely crack, but they can sag or pull apart where the ground has settled after building work.
The warning signs are much the same either way: a smell outside the back door, damp patches near a wall, rats around a gully, or a blockage that comes back soon after it has been cleared. Where the pipe is sound enough, we can reline it from the inside as a no dig repair, leaving patios and driveways in place. Where a section has collapsed, we dig down and replace it. You hear about both options first, and the price is agreed before any work begins.
A camera survey shows what is happening inside the pipe instead of leaving anyone to guess. We send a small camera along the drain, record the footage and note any cracks, roots, displaced joints or dips where water sits. It is worth having before you buy a house, before an extension goes up near a drain, or after a run of repeat blockages. Our CCTV drain surveys come with a written summary in plain English.
Away from the housing, Dartford has warehouses and business units near the river and the crossing, with shops, pubs and takeaways in the town centre and the Bluewater shopping centre close by. Commercial drains work far harder than a household system. More people use them, more food waste reaches them, and the pipe runs are often long, with several gullies and sinks feeding into one line.
We look after commercial drainage in Dartford with unblocking, jetting, camera surveys and repairs. For kitchens and yards where fat and silt build up quickly, we can arrange planned cleaning so the drains are cleared before they force a closure. See our commercial drainage page for more.

Some problems will not wait until the morning: sewage rising in a downstairs toilet, a manhole lid lifting in the garden, or dirty water backing up into a kitchen sink. We take emergency calls 24/7 across Dartford and aim to be on site within the hour.
When we arrive, we make things safe first, then clear the blockage and find out why it happened. If a repair cannot be finished on the night, we explain what is left to do and agree the price before going any further. Our emergency call outs page has more.
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For a general blockage, whether that is a slow kitchen sink, an outside gully overflowing onto the patio or a manhole full to the top, our homepage sets out how we deal with blocked drains in Dartford and across Kent. The same team covers Stone, Wilmington and Greenhithe within the DA1 and DA2 postcodes, and we cover Bexleyheath across the border as well.
Answers to the things Dartford customers ask most about jetting, toilets, baths and drains near the river.
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