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- Drainage across London, with plumbing alongside
Walton-on-Thames sits on river gravel beside the Thames, and in the lower-lying streets groundwater can affect the drains.
The riverside streets and the newer waterside developments sit close to the water table, which can be high, particularly in winter. Older pipework with open joints below that line takes groundwater in continuously, so the drain runs part-full, loses the velocity that keeps it scoured, and fills with fine silt, which a CCTV drain survey can confirm. That is why some drains near the river seem to block repeatedly for no apparent reason.
The newer riverside flats bring the modern version of the same geography. Below-ground and ground-floor drainage in low-lying development can be pumped rather than gravity-fed, which introduces sump pumps, rising mains and non-return valves. Those are components with a service life, and when one fails there is no gravity fallback at all. Inland, Hersham and the streets away from the river are conventional interwar and post-war housing on clay, with seasonal ground movement and root ingress.
Groundwater can get into open joints, so the drain does not run clean and silt keeps coming back.
Low-lying development relies on pumps and non-return valves. When one fails there is no gravity fallback.
Away from the river, older pipework in Hersham can crack as clay soil moves.
This page covers Walton-on-Thames and Hersham (KT12). If your postcode is on the edge of this area, call and ask rather than assuming.
Call and speak to the engineer. 24 hours a day, including tonight.
Sinks, toilets, gullies and main drains cleared, with the cause identified rather than guessed.
Overflowing gullies and blocked manholes or inspection chambers, cleared and explained.
Toilets that will not flush, or that fill up and will not drain, cleared without damaging the pan or the soil pipe.
Kitchen sinks and waste pipes blocked with grease, cleared properly rather than just poked through.
Standing water in the bath or shower tray, and slow bathroom basins, cleared at the cause.
Sewage backing up, drains overflowing, or a home or business you cannot use until it is fixed. Phone answered 24/7.
Scours grease, silt, scale and roots off the pipe wall, rather than just making a hole through the blockage.
See the inside of the pipe: recurring blockages, pre-purchase checks, insurance and subsidence claims.
Cracked joints, root damage and collapsed sections, repaired without digging where the pipe allows.
Restaurants, pubs, offices, landlords and managing agents: planned maintenance and out-of-hours call-outs.
Leaks, taps, traps, toilet cisterns and waste pipes: the plumbing that often comes with a drainage job.
Common questions about drainage in Walton-on-Thames, answered for the kind of property you find there.
Near the river that is often groundwater rather than anything you are doing. On gravel with a high water table, a joint that has opened below the water line lets water in continuously, so the pipe sits part-full and silts. Sealing the defect with a liner is what stops it; another clearance will not.
If the building is low-lying, the drainage may well be pumped rather than gravity-fed. When a pump seizes, trips or loses power there is no fallback, so everything stops at once and the sump fills. Check whether it has tripped at the consumer unit, and treat it as urgent, because a failed pump fills quickly.
Call and speak to the engineer, 24 hours a day, including tonight.
