How to choose the right Alveus granite sink – hardness, color, and size

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How to choose the right Alveus granite sink – hardness, color and dimensions

Alveus granite sinks are currently among the most popular choices for kitchen units on the Slovak market, and for good reason. The combination of a durable material, a wide range of colors and precise German design makes these sinks a product that can satisfy both practical and aesthetic needs. Despite this, in practice, it repeatedly happens that customers choose an unsuitable size, skip important differences in the hardness of individual lines, or choose a color that does not look as they imagined after installation. The goal of this article is to help you avoid these mistakes – objectively, based on what years of customer experience have shown us.

If you are here for the first time and are considering the material issue more broadly, we recommend also reading the related article Alveus granite sink vs. stainless steel sink – comparison of properties and maintenance, where you will find a comparison of both categories. Here we focus exclusively on granite – its composition, hardness, color logic and dimensional logic.

What exactly is "granite" in an Alveus sink – and why it matters

The word "granite" is a bit misleading in the context of sinks, because it is not a natural stone, but a composite material. Alveus (and most similar manufacturers) produces granite sinks from a composite made by mixing granite granulate (granite) and polymer resin. The ratio of these two components is key – the higher the proportion of mineral filler, the harder, heavier and more durable the final product is.

A typical cheap "granite" sink from Asian production contains 40–55% mineral filler, the rest is resin. Alveus works with a mineral content of around 75–80% in its standard granite line, which is a big difference in practice. A higher content of stone means:

higher resistance to scratches (surface hardness is closer to stone than to plastic)
better heat resistance (the sink does not crack even when in contact with boiling water up to 280 °C)
lower noise when water drips (mineral dampens sound better than resin)
higher sink weight – which is important to consider during installation
longer service life and less visible wear after years of use

Specific hardness values for Alveus granite sinks range around 4–5 on the Mohs scale (for comparison: glass has 5.5; standard stainless steel 4–5; plastic sink under 2). This means that the Alveus granite sink is actually harder than most plastic alternatives and achieves comparable values to stainless steel, while at the same time having significantly better resistance to visible scratches from cutlery.

Color scale of Alveus granite sinks – a practical choice, not just aesthetics

Alveus offers granite sinks in several basic color variations. In the catalog you will typically encounter designations such as NAT (natural beige-gray), 91 (black with a fine granulate effect), Chrom or other surface processing designations. It should be said that the color of the sink is not just an aesthetic choice – it also has practical implications for maintenance and the visibility of wear.

Black and anthracite shades (code 91 and similar)

Dark sinks look great in the kitchen and are very popular in modern lines with glossy fronts or in industrial style. However, you should know what to expect in practice:

Water stains and lime deposits are much more visible on a dark surface than on a light sink. In areas with hard water (most of Slovakia has a water hardness of 15–25 °pH), this means the need for more frequent cleaning.
An advantage is that scratches and grooves are visually less noticeable on a dark sink than on a white one.
Dark granite can absorb more heat under strong direct sunlight in the kitchen, which is not a problem from a material point of view, but can be unpleasant to the touch.

An example of a product in this color version is ATROX 50 black 91 + pop up siphon 790x500x200 mm – a robust sink with dimensions 790 × 500 mm and a built-in pop-up siphon, ideal for larger kitchen units requiring a spacious hob.

Natural and light shades (code NAT and beige variants)

Lighter shades are more practical in terms of the visibility of water scale – deposits blend with the surface. On the other hand, possible staining from food (beets, turmeric, red wine) can leave marks that require more intensive cleaning.

If you are looking for a sink in a natural shade, take a look at, for example, ZOOM 10 NAT – a compact solution in a light natural finish, suitable for smaller kitchens or a second work area.

How not to choose color "blindly" – practical advice

In showrooms or on photographs, each color looks a bit different than in the real environment of your kitchen. We always recommend:

Comparing the color swatch with the real color of the kitchen cabinet fronts and the worktop – best under natural and artificial lighting.
Considering the color of the lower cabinet and the entire kitchen color scheme – a black sink stands out against white or gray fronts, a light one blends with a wooden décor.
Considering who will use the sink daily and what the cooking style is in the household.

Granite Sink Dimensions from Alveus – What You Really Need to Know Before Buying

The dimension question is technically the most critical part of choosing a sink. A poorly chosen dimension means either unnecessary modification of the worktop or a sink that fits in the cabinet "just barely," complicating the installation of the faucet and trap during mounting. A more detailed discussion of measuring the worktop can also be found in the article What sink size do I need – How to measure the worktop before purchase, here we summarize the most important points.

Basic dimensions and what they mean

The manufacturer always specifies the dimensions of the sink itself (the outer rectangle), not the size of the cutout in the worktop. The basic rule applies: the cutout in the worktop is smaller than the sink by 10–15 mm on each side (exact values can be found in the installation instructions for each model). For a sink with dimensions, for example, 790 × 500 mm, the cutout in the worktop will be approximately 765–775 × 475–485 mm.

Dimensions affect:

Cabinet width – standard kitchen cabinets have widths of 45, 60 or 80 cm. For a sink width of 60 cm (e.g. 580 mm), you need a cabinet of at least 60 cm. For a sink of 790 mm, you need a cabinet of 80–90 cm.
Depth of the worktop – standard depth is 60 cm (600 mm). A sink with a basin depth of 200 mm and an external dimension of 500 mm will fit into a 60 cm worktop without problems.
Basin depth – the deeper the basin, the more space inside it, but also a higher pipe lift. Typical basin depths in the Alveus catalog are 150–200 mm.
Drain position – classically located at the front (so-called front drain), which is more convenient for the trap, some models have a rear drain for maximum use of the cabinet interior.

Single-basin vs. double-basin sinks – when to choose which?

A simple (single-basin) sink is suitable if:

the kitchen cabinet is 50–60 cm wide
you have a dishwasher and the sink serves more for quick washing
you want maximum space in one larger basin (for large pots, baking trays)

A double-basin sink is suitable if:

the cabinet is at least 80 cm wide
you don't have a dishwasher or use it rarely
you want to separate washing (one basin) from rinsing/drying (the second basin)

More about this decision can be found in the article Simple or double sink – which is suitable for your kitchen.

Specific Alveus Models – What to Look for When Choosing

Browsing the catalog is one thing, but in practice, it is better to start from what you actually have in the kitchen – what size cabinet, what depth of the worktop, and what style of sink use you expect.

Sets with faucet – a practical and economical choice

Alveus offers not only individual sinks but also complete sets, where the sink is matched with a faucet that fits both dimensionally and in design. This is a more convenient option for customers who do not want to deal with the compatibility of the faucet with the sink opening, the height of the spout, or the color of the fixtures.

For a larger kitchen line with a cabinet of at least 130 cm, we recommend looking at SET ALVEUS INTERMEZZO 130/81+BATERIE TONIA Chrom – it is a double-basin set with an outer dimension of 130 × 81 cm and a Tonia faucet in chrome finish. Such a solution is standard in households without a dishwasher, where the sink is used intensively.

For smaller spaces or kitchens where the cabinet is about 60 cm wide, an interesting option is SET ALVEUS INTERMEZZO 30/91 + BATERIE DELOS 91 – a compact set with a black faucet. The number 30 in the designation usually indicates the type of basin and configuration, code 91 indicates the black color of the composite.

For customers looking for a solution in a work area with an emphasis on clean design and a smaller worktop, the SET ALVEUS CADIT 40/55 + BATERIE RUTA CHROM comes into consideration – an impressive sink from the Cadit series in size 40/55 with a chrome Ruta faucet, which stands out with light lines.

How to read Alveus model designations

Designations may look chaotic, but they have their logic. For example:

INTERMEZZO 130/81 – Intermezzo series, outer dimensions width 130 cm × depth 81 cm
ATROX 50 – Atrox series, width approx. 50 cm (790 mm), i.e., a larger single-basin sink
ZOOM 10 – Zoom series, compact configuration
code 91 – black color (black composite finish)
NAT – natural (natural) beige-gray color
Chrom – chrome faucet or surface finish

Technical details most people overlook

Drain opening and trap compatibility

The standard drain opening of Alveus granite sinks has a diameter of 90 mm (3.5 inches), which is the European standard. The trap – whether a classic trap or a modern "pop-up" (with an automatic closure controlled by a round button) – must have a corresponding diameter. Pop-up traps are visually more pleasant, but they contain more moving parts and need to be occasionally cleaned of hair and dirt.

Some Alveus models have a drain closer to the front edge of the basin, others at the back – for low cabinets, it is important to check whether the trap under the sink will actually fit into the cabinet. The minimum free height from the bottom of the sink basin to the bottom of the cabinet should be at least 250–300 mm for a standard trap.

Opening for the faucet – one or two holes?

Alveus granite sinks are usually delivered with a prepared hole (or holes) for the faucet. The standard hole has a diameter of 35 mm. Some models have one hole, others two (for a two-handle faucet or a separate soap dish). Before purchase, check how many holes your model has and whether the faucet from the set uses the same configuration.

Weight of the granite sink – reason to prepare for installation

A larger Alveus granite sink (e.g. 790 × 500 mm) can weigh 15–22 kg. During installation, we recommend always working in pairs – one person holds the sink, the other tightens the mounting clips and applies the sealant. Installing it alone is physically possible, but you risk scratching the sink against the edge of the countertop. The installation procedure including the use of clips and silicone sealant is described in detail in the article Installation of the Alveus granite sink – step-by-step guide including the trap and faucet.

Resistance to chemicals and heat

The Alveus granite material is resistant to common kitchen acids (vinegar, lemons), bases (dishwashing detergents), and heat up to 280 °C. It is not resistant to concentrated acids (e.g. sulfuric acid, hydrochloric acid – which do not typically appear in the kitchen) or to prolonged contact with acetone. If you want a comparison with stainless steel in terms of chemical resistance, see the article Alveus granite sink vs. stainless steel sink – which is better for your kitchen.

Most common mistakes when choosing a granite sink – from customer experience

After years of customer experience, we have identified several mistakes that repeat regardless of whether the customer is buying their first or third sink in their lifetime.

Mistake No. 1 – Measuring the cabinet instead of the countertop

The customer measures the width of the cabinet (e.g. 60 cm) and orders a 600 mm sink. It does not fit into the cutout because the countertop overhangs the cabinet and the cutout for the sink is smaller. The correct approach is to measure the actual width of the cutout in the countertop (or calculate it from the cabinet width minus the countertop overhang). A detailed guide on measuring is available in the article What size sink do I need – how to measure the cabinet and choose the right dimensions.

Mistake No. 2 – Buying a sink without a compatible trap or faucet

The customer buys the sink separately and the faucet separately – and then discovers that the faucet has only one hole while the sink has two holes, or vice versa. Sets are more advantageous not only in terms of price, but also because the manufacturer guarantees compatibility of the components. If you do buy separately, always check the number and diameter of the holes for the faucet.

Mistake No. 3 – Choosing the color based only on a photo

As we have mentioned, colors on the screen differ from reality. Black sinks look impressive in photos, but in a specific space with specific lighting, they may appear differently. If possible, request a physical sample of the material or visit a showroom.

Mistake No. 4 – Underestimating the weight during installation

A heavier granite sink (16–22 kg) can damage the edge of the countertop, crack the tiles (if it falls), or cause injury if handled incorrectly. Always work in pairs and have soft padding ready to protect the countertop surface.

Mistake No. 5 – Ignoring the trap height under the sink

Certain combinations of sink and trap may not match in height. If the cabinet is low (e.g. only 60 cm in height) and the sink has a deep basin (200 mm), the trap under the sink may interfere with the waste pipe too low and will not achieve the required slope for drainage. Always check the free height under the sink before purchase.

Maintenance of the Alveus granite sink – practical daily routine

The Alveus granite sink requires proper yet simple care. Compared to stainless steel sinks, it is less prone to visible scratches from utensils and tools, but it has higher requirements in areas with hard water.

Daily routine: after each major cleaning, wipe the sink with a soft cloth and let it dry – this prevents the buildup of limescale.
Weekly maintenance: a cleaning product based on citric acid (standard kitchen degreaser) or diluted vinegar (1:5 with water) – apply, let it sit for 5 minutes, then rinse. Do not leave it on for longer than 30 minutes – prolonged contact with acid can damage the surface.
Monthly impregnation: the manufacturer recommends treating the surface with mineral oil or a special impregnator for composite sinks – this helps maintain the natural sheen and improves water repellency.
What not to use: abrasive scrubbers, steel wool, chlorine bleach (long-term use), acetone, or abrasive powders.

Frequently asked questions (FAQ)

Is the Alveus granite sink suitable for daily intensive use with large pots?

Yes. The Alveus granite composite with a high mineral content (75–80 %) is specifically designed for intensive kitchen use. Large pots, baking sheets, and cast iron pans will not damage the sink as long as they are not dragged across the surface with excessive force. The heat resistance up to 280 °C means that even a pan taken directly from the oven will not cause damage.

How do I know if my countertop is suitable for the mounted (overmount) Alveus granite sink?

The standard procedure is to check the thickness and material of the countertop. A standard laminated countertop with a thickness of 28–38 mm is suitable. Thinner countertops (under 20 mm) or glass countertops may require special mounting clips or consultation with an installer. Always check that the width of the cutout matches the mounting dimensions of the sink.

Can I connect a standard kitchen faucet of another brand to the Alveus granite sink?

Yes, as long as the faucet of another brand has the same diameter of the mounting flange (standard Ø 35 mm) and the corresponding number of holes. When combining components from different manufacturers, it is always better to check with the seller – some faucets have a longer flange or a different mounting mechanism that may not fit the thickness of the sink basin.

Black color of the sink (code 91) – will it fade over time?

The Alveus granite composite is colored throughout the entire material, not just surface-lacquered. This means that even with significant surface scratches, the color will not fade to white. With normal use (after 5–10 years of intensive use), the sink may slightly lose some of its gloss and appear more matte, but the color remains stable.

What is the difference between the Intermezzo, Atrox, Cadit and Zoom series?

These are lines that differ mainly in size, shape of the basin and design philosophy. Intermezzo is a larger family with multiple configurations (single and double basin), Atrox is a robust larger sink for demanding use, Cadit is a more design-clean model suitable for modern kitchens and Zoom is a compact series for smaller spaces. All series share the same material quality and Alveus production standards.

Is it better to buy a sink + faucet set or to assemble the components separately?

For most customers, a set is more advantageous – you save time searching for a compatible faucet, the set price is usually lower than the sum of individual items and the manufacturer guarantees design and technical compatibility. Choosing components separately makes sense if you have specific requirements for the faucet (e.g. pull-down head, special design, specific height of the spout) or if you are adding an existing faucet to a new sink.

Conclusion – how to approach the selection step by step

Selecting the right Alveus granite sink is not complicated if you proceed methodically. Start with what you actually have – the size of the cabinet, the thickness and dimensions of the worktop, the type of waste pipe and the height of the free space under the sink. Then ask yourself what kind of sink usage you expect – intensive cooking without a dishwasher, or rather an auxiliary sink next to the dishwasher? Based on that, you choose the size and configuration of the basin.

Choose the color only at the end – and choose it based on the hardness of the water in your area, the color of the kitchen line and your usage habits. A dark sink is visually impressive, but with hard water it requires daily maintenance. A light sink is less prone to limescale, but is more sensitive to staining from food.

If you want to be sure you don't choose the wrong model, order a set with a faucet – the manufacturer has already solved the compatibility for you and you get a functional unit ready for installation. Models such as SET ALVEUS INTERMEZZO 130/81+BATERIE TONIA Chrom for a large kitchen, SET ALVEUS INTERMEZZO 30/91 + BATERIE DELOS 91 for a smaller space, or SET ALVEUS CADIT 40/55 + BATERIE RUTA CHROM for a modern design intention – all these sets will provide you with a basis for a reliable and aesthetically pleasing kitchen for years to come.

Do you have a question about this topic?

Having trouble deciding or dealing with a specific situation in your home? Write to us – we are happy to help.