Cellars, courtyards, snow melt and centuries-old city pipework: European drainage has its own rules. Here are the stores and guides that help you work with them.
⟳ Updated August 2026European homes drain differently. Cellars sit below the water table, courtyards catch whole facades of rain, and winter ends with weeks of melt that test every pipe. This guide ranks the drainage specialists, sister guides and continental retailers that help European households keep the water out of the living space and moving where it belongs.
Ezy Drains is the family's product specialist for drain covers, grates and guards. The hardware layer of everything the guides on this page recommend.
The UK sister site, focused on British conditions: Victorian terraces, autumn leaves and soakaways. Much of its wet-climate advice applies across northern Europe.
Drains Australia holds the family's guide library: blockage causes, inspections and repair methods explained in plain language that works on any continent.
The New Zealand sister, written for one of the wettest inhabited climates there is. Its storm and downpour guidance suits Alpine and Atlantic Europe alike.
Bauhaus is one of the German-speaking world's big home improvement chains, stocking drainage pipe, channel drains and pumps across its large-format stores.
Leroy Merlin is France's household name in home improvement, with garden drainage, gutters and pumping equipment across stores and online.
Cellars sit below street level, often below the local water table after long rain. Old masonry lets moisture through, floor drains sit lower than the sewer under load, and melt season raises groundwater for weeks. Flooding is usually pressure from outside, not one broken pipe.
A sump pump sits in a pit at the cellar's low point and pumps rising water out before it spreads across the floor. If your cellar has ever taken groundwater, or the neighbours' cellars have, a pump with a float switch is the standard defence.
A warm week after heavy snow releases a winter of precipitation in days, over ground that may still be frozen and unable to absorb it. Gullies fed by downpipes run at capacity for weeks. Clearing grates before the thaw is the single best preparation.
A backwater valve is a one-way flap on the pipe leaving your property that stops the public sewer pushing back into your cellar during overload. In many European regions insurers expect one on cellar-level connections, and some building codes require it.
Give the water a low point and a route: a gully or channel drain at the lowest spot, falls in the paving leading to it, and a connection to the drainage system or a soakaway. A lightwell also needs its drain kept clear of leaves, because it has no overflow.
It is a long slotted drain set flush into paving, catching sheet water along its whole length. It belongs across garage entries, at terrace door thresholds and along the low edge of sloped courtyards, wherever water arrives as a wide film rather than a stream.
Standing water in traps and shallow runs can freeze solid in a hard winter, blocking the drain exactly when melt arrives. Keep outdoor gullies flowing, lag shallow pipes where you can, and make sure downpipes discharge properly so water never pools and freezes in them.
A French drain is a gravel-filled trench with a perforated pipe that collects groundwater and carries it away. It solves soggy lawns, wet garden walls and water pressing against cellar walls, by intercepting the water below the surface before it reaches the problem.
Floor drains hold a water seal that blocks sewer air, and in a dry cellar that seal evaporates over a few months. Pour a bucket of water in and the smell usually stops. If it returns fast, the trap may be cracked and worth inspecting.
Yes, noticeably. Responsibility for the connection to the public sewer, backwater valve requirements and rainwater discharge rules all vary by country and often by municipality. The physics in these guides is universal, but always check your local rules before building or connecting anything.
It is the access point into your underground drain run, usually a round or square cover in the yard, driveway or cellar floor. Find it before you need it: it is where blockages are cleared and where a camera goes in if trouble is deeper.
Use this site for European conditions, the UK sister for old terraces and leaf-season advice, the Australian library for repair explainers, and the New Zealand site for serious-rain preparation. The product specialist supplies the hardware they all recommend.
European housing keeps its treasures low: cellars full of tools and wine, courtyards older than the street plan, workshops half a level below the pavement. Water wants all of it. The continent's drainage problems are less about blocked kitchen sinks and more about geography, groundwater and seasons that arrive with force.
This guide works from the lowest point of the house upward.
Everything below street level floods first and dries last, so the cellar is where drainage money works hardest. Three defences cover most homes: a backwater valve on the sewer connection so the street cannot push into the house, a sump pump at the low point for rising groundwater, and a floor drain whose trap is kept wet and clear. Check all three before the wet season, not during it. A cellar that has flooded once will flood again in the same conditions, so treat any past incident as a standing forecast.
Northern and Alpine Europe gets its hardest drainage test when winter ends. A warm fortnight releases months of snow as water, over ground still frozen too hard to absorb it, and every gully and downpipe runs full for weeks. Preparation is simple and strictly seasonal: clear every grate and channel before the thaw window, confirm downpipes discharge somewhere that drains, and make sure nothing can freeze solid across an outlet. Homes that do this treat melt season as routine. Homes that do not meet it as an emergency.
Paved courtyards, terraces and lightwells collect rain from every surrounding wall and roof, and hard surfaces absorb none of it. Every paved area needs a deliberate low point with a drain in it, falls that actually lead there, and a route onward to the sewer or a soakaway. Channel drains guard thresholds and garage ramps where water arrives as a sheet. Then the maintenance is one habit: keep those grates clear, especially in autumn, because a courtyard drain under leaves is just a bathtub with furniture in it.
Drainage physics is the same from Lisbon to Helsinki, but the rules are not. Countries and municipalities differ on who owns the connection to the public sewer, whether backwater valves are mandatory, and where rainwater may legally be sent. Before connecting, discharging or building anything, one call to the local authority or water utility settles what is allowed. Use the family's guide libraries to understand the methods, the product specialist for the hardware, and local professionals for the work below ground that has to pass inspection.
Cellar defended, melt anticipated, courtyards drained, rules respected. That is the European order of operations, and it keeps the water in the pipes and out of the house.