Linear vs Point Drainage — Which to Choose

Choosing between linear and point drainage is one of the first design decisions for industrial floors, car washes or wet zones. Both solutions remove water, but they do it in completely different ways — and the right choice determines effectiveness, safety and maintenance cost.

What is the difference

Point drainage is a single inlet that collects water at one location. The floor is sloped from multiple directions “to the point” so water flows toward the grate. You will most often find them where water volume is moderate and the area is small.

Linear drainage collects water along the entire length of the unit — along a line. This allows a single slope (one- or two-sided toward the channel), so water does not have to travel long distances across the floor. The solution dries the surface faster and handles higher flow rates better.

When to choose linear drainage

Linear drainage is ideal wherever large volumes of water appear across the full width of the room or the floor must dry quickly:

• Vehicle washes and industrial washing stations — water flows in a wide front and the channel captures it along the entire line.
• Showers and wet zones — a single drainage strip eliminates awkward “four-way” slopes.
• Production halls and warehouses — where trafficability and hygiene matter and floors are large.
• Food industry — easy-to-clean channels help maintain HACCP compliance.

In trafficked areas, slot channels with a narrow inlet (8–20 mm gap) work especially well, as they do not endanger wheels of carts and pallets. Where larger cross-section and cleaning access are required, 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, process sinks, equipment connected to a grate.
• Small sanitary and welfare rooms.
• Local discharge points — e.g. under a specific machine or tap.

In such locations, ready-made professional drains made of stainless steel collect water at one point without running a long channel across the entire floor.

Slopes and floor construction

The biggest practical difference appears in floor slopes. With point drainage the floor must be shaped from several directions toward one point — the larger the area, the greater the level differences and the more difficult the execution. Linear drainage simplifies geometry: usually a single uniform slope toward the channel is enough, making it easier to install resin floors and maintain a flat, smooth surface.

Material and load class

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

Load class is selected according to traffic — from B125 in pedestrian and light-traffic zones up to F900 in the heaviest wheel-load areas. Good coordination with the floor (e.g. epoxy or polyurethane-cement Ucrete resistant up to 120 °C) is recommended.

How to choose — quick checklist

• Water volume and distribution — large volume across the full width → linear; local and small → point.
• Floor size and geometry — large surfaces are usually easier to drain linearly.
• Traffic on the floor — forklift and vehicle traffic → 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 facilities combine both approaches: linear drainage in wet and trafficked zones, point drainage at local equipment. If you need help selecting the right solution for your floor and loads, see our stainless-steel drainage systems — we design complete systems from drains to channels from a single source.