Do you have questions about our channel systems and grating covers?

Load classes are standardized categories according to DIN EN 1433 that indicate the mechanical loads a drainage channel or grate can safely withstand. They range from A15 (up to 1.5 tons, e.g. sidewalks) to F900 (up to 90 tons, e.g. aircraft tugs). ANRIN offers systems for all classes.
A crucial factor is the combination of load class and installation situation: a B125-class channel may fail if installed incorrectly (e.g. on a heavily used curve). Therefore, personal consultation to select the right class is essential for durability and safety.

ANRIN provides a statutory warranty period of 5 years for its products in accordance with § 438 of the German Civil Code (BGB). This period begins at the time of delivery to the end customer. During this time, the warranty covers material and manufacturing defects—provided the channels and grates have been properly designed, installed, and used.
In practice, ANRIN products far exceed this period: thanks to high-quality materials such as polymer concrete or stainless steel and precise manufacturing, the systems can achieve a service life of up to 30 years.

Yes. ANRIN channels are designed so that no rattling or clattering noises occur when installed correctly. Polymer concrete in particular has sound-dampening properties. In addition, robust grate locking systems (e.g. TwistLock, SnapLock) prevent rattling when driven over by vehicles.

A building authority approval (e.g. from the DIBt) certifies that a product meets the construction regulations in Germany and can be used safely over the long term.
For drainage channels, this approval is especially important for installation in public or safety-relevant areas—such as train stations, schools, or traffic surfaces. ANRIN products comply with DIN EN 1433 and often with additional specific regulations; they are regularly tested.

Die KF-100 Rinne, sowie die SF-100, SF-150, SF-200 und SF-300 Rinnen haben eine bauaufsichtliche Zulassung.

Yes. Many ANRIN channels are suitable for indoor applications—such as garages, workshops, basements, or technical rooms. Polymer concrete channels are especially recommended due to their chemical resistance and dimensional stability. Choosing the right grate cover and a slip-resistant surface is important. Connection to interior drainage systems is also easily possible.

The service life of an ANRIN channel typically ranges between 30 and 50 years, depending on material, installation conditions, and use. Polymer concrete is particularly durable because it resists frost, chemicals, water absorption, and mechanical impact. Grates made of stainless steel or KTL-coated cast iron show minimal wear even under heavy loads. Regular maintenance (removing leaves, cleaning sediment) further extends service life.

Yes, the dirt bucket is included as standard. It is located inside the gully box and collects coarse debris such as leaves, gravel, cigarette butts, or sand before the water enters the sewer system. The bucket is removable, easy to clean, and contributes to the overall ease of maintenance.
For heavily used systems, we recommend emptying it regularly—at least once or twice a year.

Yes, ANRIN plastic grates are UV-resistant. They are made from high-quality plastics such as polyamide or PE-HD, optimized for outdoor use. UV radiation can cause brittleness or discoloration in inferior plastics. However, ANRIN uses only plastics with additives that protect against these effects.
This means that even after years of outdoor exposure, the grates retain their stability, elasticity, and color—an essential prerequisite for long-term use in private or commercial settings.

CDC stands for Cathodic Dip Coating—a high-quality coating process used by ANRIN, for example, on cast-iron grates. The grate is immersed in an electrically charged paint bath, and the coating is evenly distributed across the component, even in hard-to-reach areas.
CDC provides excellent corrosion protection and high resistance to mechanical and chemical influences. This makes the grates particularly durable—ideal for high-load or aggressive environments such as industrial areas, gas stations, or roads.

An apparently “rusting” cast-iron grate is usually not defective—it develops a natural rust patina for aesthetic or functional reasons.
Uncoated cast-iron grates such as the “Celtic” or “Leaf” design grates are deliberately designed to form this protective layer, which shields the underlying material.
However, if coated grates (e.g. CDC-coated) rust, the cause may be mechanical damage or a defective coating.
Important: surface rust does not necessarily affect performance or load capacity—the structural integrity remains intact.

Yes – even if a cast-iron grate shows surface corrosion, it does not automatically lose its load-bearing capacity. The load class depends on design and material cross-section. Surface rust has no direct effect on that.
What matters is that there are no structural damages such as material flaking or perforation.
When used correctly (e.g. C250 or D400 cast-iron grate in the appropriate area), the grate continues to meet DIN EN 1433 requirements even with oxidation.

ANRIN uses primarily polymer concrete and high-quality grates made from galvanized steel, stainless steel, cast iron, or plastic—all with excellent resistance to a wide range of chemical substances.
Polymer concrete, for example, has a closed material matrix that prevents fluid penetration. This makes the channels resistant to typical conditions found in breweries, dairies, slaughterhouses, food warehouses, or wastewater applications.
KTL-coated cast-iron and stainless-steel grates (V2A/V4A) also offer high chemical resistance. Regular cleaning and maintenance are essential for long-term functionality.

 

Chemical Resistance Chart for Polymer Concrete

 

Slip resistance is a key factor in public and commercial areas. ANRIN offers grates with various surface textures achieving slip-resistance classes up to R13 in accordance with DIN 51130.
Stainless-steel and mesh grates with special profiling provide excellent footing—ideal for barrier-free zones, swimming pools, workshops, or catering areas. The specific slip-resistance class depends on the grate type used.

Generally, no—stainless steel (especially V2A and V4A) is corrosion-resistant. However, “foreign rust” can occur if stainless steel comes into contact with rusting metal or is cleaned using improper tools (e.g. steel brushes).
Therefore, only plastic or stainless-steel tools should be used for cleaning.
In chloride- or salt-rich environments (such as swimming pools or coastal areas), V4A is the safer choice over V2A.

Grates made from plastic or coated cast iron are non-conductive.
However, stainless-steel or mesh grates can conduct electricity. Grounding is required when electrical systems are nearby or when lightning protection regulations apply.
For industrial or public facilities, we recommend involving the responsible electrical planner.

ANRIN polymer concrete is extremely temperature-stable in use. Continuous temperatures from -40 °C to +100 °C pose no problem. Short-term exposure—such as from hot weather, bitumen work, or hot water—can reach up to 150 °C.
Importantly, due to its dense matrix, polymer concrete reacts minimally to temperature fluctuations—it neither cracks nor deforms.

Plastic grates heat up significantly less than metal grates under sunlight. Depending on ambient temperature, sunlight intensity, and color tone, surface temperatures reach approx. 40–60 °C—compared to over 80 °C for dark cast-iron grates.
This makes plastic grates ideal for barefoot-friendly applications such as pool areas, playgrounds, or patios. Light colors further reflect sunlight and remain pleasantly cool.

Yes, ANRIN channels can be placed directly onto a prepared concrete surface during renovation—provided the surface meets the required strength and load-bearing capacity for the expected load.
It is recommended to use a bonding agent or apply bonding slurry to the contact surface.
Sealing the joint with sealing tapes or elastic sealants (e.g. PU or MS polymer) prevents water penetration between the channel and the old concrete—important to avoid frost damage or voids.

In maritime environments, exposure to saltwater, humid air, and salt particles is extremely high.
For such applications, ANRIN recommends using only stainless steel V4A (1.4571) and specially KTL-coated cast-iron grates. Polymer concrete itself is saltwater-resistant.
A well-designed drainage concept is also important to minimize deposits caused by spray or sand.

End walls and end caps often have molded perforations that act as predetermined breaking points.
They can be opened with a hammer and chisel, a punch, or a multitool if needed.
Important: carefully score around the perforation at a small distance to avoid chipping the polymer concrete.
After removal, deburr and smooth the edge and seal if necessary (e.g. with bitumen or a sealing collar) to ensure a clean pipe connection.

• TwistLock: Place a wrench (M13) on the bolt head and turn counterclockwise.

• SnapLock: Insert the grate hook into the slot of the cover grate and lift sharply.

• RapidLock: Insert a screwdriver into the slot of the locking spring (two per grate) and lever it open by tilting the tool.

All systems are designed for easy maintenance and allow quick, safe opening without great effort.

The simplest method to prevent clogging of the slots in the ANRIN Sport Slot Channel is to cover them with adhesive tape before applying the synthetic surface.
Afterwards, the slots can be reopened easily with a knife.

Yes, theoretically it’s possible. However, in most on-site conditions, the required installation depth for a sump unit (minimum 45 cm) is not available when using a flat channel.

The ANRIN SPORT clamping rail and clamping block are designed for artificial turf heights of approximately 20 to 30 mm.
These clamping systems are ideal for sports facilities where artificial turf with elastic underlayers or quartz-sand infills is installed.
The clamping technique securely holds the turf in place, preventing shifting during use or maintenance.

Most channels and covers are only available in straight form. They can, however, be installed along a curve, though this will create an uneven joint on one side that widens or narrows depending on the radius.
For precise installations, we can offer polygonal cuts of channels and grates on request and after on-site measurement.

This cannot be fixed to a specific value. Ultimately, the aesthetic preference determines the technical feasibility.
Installing straight channels along a curve will always result in joints of varying width, which visually interrupt the grate pattern.

The inspection cover provides access for maintenance and is installed at strategic points in the drainage system to reach the gully box and pipe connection.
For cleaning, the cover is removed, deposits are cleared, and the flow checked.
The “filling” of the cover is done with the same surface material—e.g. paving stones or natural stone slabs set in mortar.

ANRIN polymer concrete channels can be neatly shortened using an angle grinder with a diamond cutting disc.
For precise cuts, use a guide rail or miter box. Important:

• Deburr the cut edge.

• Remove dust with a vacuum.

• Seal cut edges on metal parts with resin or protective coating if necessary.

When shortening, take care not to damage locking elements such as the TwistLock position.
Accessories like end caps or end walls can then be fitted or sealed in place.

No, not as a general rule.
The only exception is installation in LAU facilities—plants for the storage, filling, and handling of water-hazardous substances.
According to the German Water Resources Act (WHG), these must be designed and built to prevent contamination of water bodies.
This includes the use of special liquid-tight materials (such as FDE concrete or mastic asphalt) and the installation of barriers or containment systems.
Drainage channels must therefore also be sealed to be liquid-tight.
The ANRIN KF-100 and SF-100 to SF-300 systems meet these requirements when installed and sealed with suitable materials.

Yes. The ANRIN sealing kit can be used both for sealing the channel ends and for expansion joints outside the channel—e.g. between channel and frame or channel and concrete surface.
The ANRIN sealing set includes:

• A sealer (2-component, permanently elastic polysulfide sealant)

• A primer (9102)

• A mixing stand with spiral

• A manual dispenser

The sealer is part of the joint sealing system with general building authority approval no. Z-74.6-27 and KIWA certification.
All product data sheet and approval specifications must be observed.

Some channel systems include bodies of different heights or with integrated gradients.
For these systems, the end walls are designed for the tallest channel height but can be attached to all channel types within the system.
This means only one universal end wall is needed.
The maximum height difference that may occur is approximately 10 cm.

No. We do not supply pipe reducers ourselves.
We refer to building material dealers, who typically offer various types of reducers and pipe bends.
Note: Reducing a pipe diameter (e.g. from 160 mm to 110 mm) should be avoided; instead, it is better to expand from 110 mm to 160 mm.

Sloped channels have an integrated gradient built into the channel body (e.g. 0.5 cm per meter).
They are ideal for directing water efficiently toward the collection point—especially on flat surfaces or where the surrounding terrain slope is insufficient.
This prevents standing water, increases flow velocity, and enhances self-cleaning.
ANRIN offers systems with factory-integrated gradients and matching accessories.

ANRIN sump units usually have two opposite outlets in different diameters, providing flexibility during installation.
This adaptability is crucial for site planning, as height levels or existing pipe routes can vary.
The unused outlet is closed with a blank cover, which is included in the delivery.

ANRIN offers flat channels with an especially low height starting from about 60 mm (e.g. KE-100).
These models are ideal for renovations where space is limited—such as underground garages, terraces, or barrier-free access points.
Despite the low height, they offer good retention volume and can be combined with various grate designs.

No.

Not as standard.
However, grates or covers made from V4A can be custom-ordered directly from the respective manufacturers.

The TwistLock screws are made of stainless steel—usually V2A (1.4301).
This material provides high corrosion resistance, durability, and mechanical stability.
The stainless-steel components remain resistant to wear and weathering even with frequent use.
For particularly aggressive environments (e.g. coastal or chemically exposed areas), V4A versions are available on request.
Depending on the grate design, screws may be blackened.
The locking bar is made from impact-resistant polyamide PA6.6.

With the OvalGrip bar grate, ANRIN offers an innovative design capable of handling large water volumes.
It adapts the characteristics of a mesh grate and translates them into an organic form language for materials like cast iron or plastic.
Offset oval openings create a structured surface that slows down and captures incoming water while improving slip resistance.
The special shape of the OvalGrip bars disperses water effectively during heavy rain and directs it reliably into the channel body.

In most cases, no.
ANRIN grates are precisely matched to the company’s own channel geometry and frame shape—including width, locking points, depth, frame height, and locking system (e.g. TwistLock).
Even if they appear similar, foreign grates usually do not fit correctly, compromising load capacity and safety.
Likewise, ANRIN grates fit only ANRIN channels.
Recommendation: Always use original components to ensure performance, warranty, and longevity.

ZM stands for zinc-magnesium coating.
This innovative material combines the strength of steel with enhanced corrosion resistance—significantly higher than conventional galvanization.
The magnesium in the alloy provides “self-healing” protection for minor scratches or cut edges.
ANRIN uses ZM steel especially for channels with cast-iron grates or high mechanical loads.
It offers a durable and cost-effective solution with excellent resistance to weather and de-icing salt.