Linear or Point Drainage — Which to Choose

Choosing between linear and point drainage is one of the first design decisions for an industrial floor, car wash or wet area. Both solutions drain water, but they do it in completely different ways — and the right choice determines effectiveness, safety and maintenance costs.

What is the difference

Point drainage is a single inlet that collects water in one place. The floor is then shaped with slopes from many sides “to the point” so that water flows towards the grate. You will most often find them where the amount of water is moderate and the area is small.

Linear drainage collects water along the entire length of the element — along a line. This means that only one slope (one-sided or two-sided to the channel) is needed, and water does not have to travel long distances across the floor. This solution dries the surface faster and handles large flows better.

When to choose linear drainage

Linear drainage works everywhere where there is a lot of water, it appears across the entire width of the room, or the floor must dry quickly:

• Food industry — easy-to-clean channels help maintain HACCP compliance.
• Production halls and warehouses — where trafficability and hygiene matter and the floor area is large.
• Showers and wet zones — a single drainage strip eliminates troublesome four-way slopes.
• Vehicle washes and industrial washes — water flows across a wide front and the channel captures it along the entire line.

In traffic areas, slot channels with a narrow inlet (8–20 mm slot) perform particularly well, posing no risk to wheels of carts and pallets. Where a larger cross-section and cleaning access are needed, classic drainage channels with gratings are used.

When point drainage is sufficient

Point drainage is simpler, cheaper to install and logical where water appears locally and in smaller quantities:

• Single workstations, technological sinks, equipment connected to a grate.
• Small sanitary and staff rooms.
• Local discharge points — e.g. under a specific machine or tap.

In such places, ready-made professional inlets made of stainless steel collect water at one point without the need for a long channel across the entire floor.

Slopes and floor execution

The difference between the two systems is most visible in slopes. With point drainage the floor must be shaped from several directions to one point — the larger the area, the greater the level differences and the more difficult the execution. Linear drainage simplifies the geometry: usually one uniform slope to the channel is enough, making it easier to lay resin floors and maintain a level, smooth surface.

Material and load class

Regardless of whether the drainage is linear or point, durability depends on the material and load matching. In humid and aggressive environments, V2A (1.4301 / AISI 304) stainless steel is used, while where chlorides, salts or acids appear — V4A (1.4404 / AISI 316L), whose molybdenum content increases resistance to chlorine, salt and acids. Our products have PZH approval and 3.1 mill certificate according to EN 10204, and the company is a member of EHEDG.

Load-wise, the inlet or channel class is selected — from B125 in pedestrian and light-traffic zones up to F900 in the heaviest wheel traffic areas. It is ideal when drainage matches the floor, e.g. epoxy resin or polyurethane-cement Ucrete resistant up to 120°C.

How to choose — quick checklist

• Amount and distribution of water — large, across the whole width → linear; local, point → point.
• Size and geometry of the floor — large surfaces are usually easier to drain linearly.
• Traffic on the floor — trafficability and forklifts → slot channel or appropriate load class.
• Hygiene — food and wet zones → smooth, easy-to-clean stainless steel surfaces.
• Chemical environment — chlorides and acids → V4A material.

Most often both approaches are combined in one facility: linear in wet and traffic zones, point at local equipment. If you want to select a solution for a specific floor and loads, see our stainless steel drainage systems — we design them comprehensively, from inlets to channels, from a single source.