What Hose Length Suits Me – Fixed or Extendable?

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What hose length suits me – fixed or extendable?

This is a question not only for beginners during their first replacement of a hose under the sink, but also for experienced plumbers in atypical installation situations. At first glance, it seems trivial – after all, it's just a hose – but in practice, it turns out to be one of the most frequent sources of problems when installing sanitary fixtures, sinks, toilet cisterns, or kitchen taps. Either the hose is missing a few centimeters, or it is too long, bends unnaturally and pushes on the joints. The result? Leaky connections, damaged seals, or an installation that looks poorly done.

In this article, we will thoroughly examine when it makes sense to reach for a fixed hose and when an extendable variant is not only more convenient, but the correct choice. We will look at specific dimensions, typical installation situations, limitations of both types, and show you how to measure correctly even before purchasing.

Basic classification – fixed vs. extendable hose

Stainless steel hoses for drinking water are divided into two basic types in terms of length. Each has its justification and is optimal in different conditions.

Fixed hose

A fixed hose has a fixed length that does not change. It is manufactured in standard sizes – most commonly 20, 30, 40, 50, 60, 80 and 100 cm. The stainless steel braided tube has a constant length and cannot be extended or shortened in any way during installation. If you want the hose to be shorter, you can lead it slightly curved, but this has its limits and is not ideal. If it is too short, you have no other option but to buy a longer one.

Extendable hose

An extendable hose (sometimes called telescopic or extensible) has a so-called spring internal construction that allows the length to be smoothly adjusted within a certain range – for example, from 30 to 60 cm, or from 50 to 100 cm. This range is set by the manufacturer and cannot be exceeded, but within it, you can precisely adjust the hose to the required distance and then secure it by tightening the fittings on the joints.

How to correctly measure the required hose length

This is where the most mistakes are made. Many people measure the distance from the valve (corner valve or straight valve) to the fixture connection "by eye" or measure only the straight-line distance, which does not correspond to the actual required hose length.

What to measure exactly

The hose never runs in a straight line. Even in an apparently ideal arrangement, it must make at least one bend – from the valve usually going sideways or downward, and to the fixture connection going downward or sideways. Therefore, the actual required hose length is always longer than the straight-line distance.

Practical measurement procedure:

Measure the vertical distance from the outlet of the corner valve to the bottom of the sink (or to the fixture connection).
Measure the horizontal distance between the outlet of the corner valve and the axis of the fixture connection.
Add a reserve of 5–10 cm to the sum of both distances for the curve and for tightening the joint (the hose shortens slightly when tightened).
The resulting number is the minimum required hose length.

Practical example: a corner valve protrudes from the wall at a height of 30 cm from the floor, the fixture is connected at 65 cm from the floor, and its connection is 15 cm from the axis of the valve. The vertical distance is therefore 35 cm, the horizontal distance is 15 cm, the sum is 50 cm. With a reserve for the curve, you need a hose of at least 55–60 cm. This shows how a "guessed" 40 cm hose from the store is not enough, even though "it doesn't seem to be far".

When is a fixed hose a better choice

A fixed hose is not an outdated technology that has been replaced by extendable ones. It has specific situations where it is directly more suitable, and professionals still prefer it.

Typical situations for a fixed hose

Series production of bathroom and kitchen lines: If you are installing dozens of identical devices (residential projects, hotels, office bathrooms), the distances are always the same, and a fixed hose of the correct length is faster and cheaper.
When the distance is precisely measured and standard: For example, in new bathrooms where the designer placed the valves exactly according to the standard and the distance to the faucet is precisely 30 or 40 cm – here a fixed hose fits perfectly.
Aesthetic requirements: A fixed hose lays more elegantly at the correct length, without visible "folding" or twisting typical of extendable types when at the shorter end of the range.
Higher working pressure: Some fixed stainless steel hoses have slightly higher pressure resistance, as the braiding is evenly loaded along the entire length. In extendable hoses, the stress distribution is slightly different at the expansion mechanism location.

When is an extendable hose the right choice

An extendable hose is more comfortable and safer in most situations in everyday home practice (and in the practice of smaller companies), precisely because it allows for measurement inaccuracies and solves situations where a fixed length is insufficient.

Typical situations for an extendable hose

Renovation of an old apartment or house: The piping is not ideally placed, valves protrude from unexpected places, and the faucet is slightly off-axis from the valve. An extendable hose will solve this without the need to buy another one.
Emergency installation "on site": The plumber arrives at the customer's home, measures, but does not have the exact fixed length available. An extendable hose within the range will cover the situation.
Replacing the hose without removing the faucet: When you replace the hose but do not yet have a new faucet, an extendable hose gives you room for later fine-tuning of the position.
Non-standard installations: Faucets mounted on furniture, sinks on consoles, free-standing sinks – here the distances are very individual, and an extendable hose is almost essential.
Situations where you cannot bend the hose into a larger arc: Tight spaces under the sink, where there is not enough room for the arc of a fixed hose.

Practical example: a customer is renovating a bathroom in a panel apartment from 1975. The corner valve is embedded at a height of 35 cm, but the faucet on a "design" sink is 78 cm from the floor, and the connection is 22 cm from the valve axis. The calculated required length is (43 + 22) + 8 cm of reserve = 73 cm. No standard fixed length covers this exactly, but the extendable hose PROFI MW in the range of 40–80 cm solves it precisely.

Extendable hose ranges and how to choose the right one

Extendable hoses are sold in various ranges. It is important to understand what these ranges mean and how to choose the right one to avoid problems.

In practice, this means:

30–60 cm: Suitable for toilet cisterns, sinks under low-mounted faucets, kitchen faucets with nearby piping. Typical for modern installations with valve manifolds close to the faucet.
40–80 cm: The most universal range for standard sinks. It covers most standard situations in bathrooms and kitchens. We recommend it as the "first choice" during renovations when you are unsure of the exact required length.
50–100 cm: For higher-mounted faucets, pedestal sinks, console-mounted sinks, or when valves are low on the floor. Also suitable if you route the hose with a larger arc due to space constraints.
80–160 cm (or 60–120 cm): For special situations – free-standing sinks, deep sink cutouts in bathroom furniture, shower faucets, or when the piping is distant from the installation location.

Important warning: never use a hose at the lower limit of its range so that it is compressed more than the manufacturer allows. Most manufacturers specify the minimum length including a small reserve – if you compress it even more, you may damage the internal spring construction. Conversely, never stretch the hose to the maximum range and leave it almost fully extended – it is optimal to work within the middle range of the hose.

For short connections (typically under 40 cm), you can choose, for example, the extendable hose PROFI MW with a range of 30–60 cm and a 3/8" FF thread, which is ideal for toilet cisterns or kitchen faucets with a short distance from the piping.

How the length of the hose affects pressure and water flow

A technically correct, but less discussed topic in practice. The length of the hose does affect pressure loss during water flow. For standard household systems (working pressure 3–6 bar, flow rate of a few liters per minute), the difference between a 30-centimeter and a 100-centimeter hose is negligible – we are talking about hundredths of a bar of pressure loss. This is absolutely insignificant for practical use in a bathroom or kitchen.

The inner diameter of the hose is more practically significant than its length. Hoses with a 3/8" diameter have a lower flow rate than 1/2" hoses. If you are interested in this topic in more detail, see the article 3/8" or 1/2" thread – how to find out what you need in our Knowledge Center.

Fixed vs. extendable from the perspective of durability and safety

Many customers are mistaken here – they think that an extendable hose is "mechanically more complex" and therefore less reliable. In practice, it is not that simple.

Fixed hose – durability

A fixed stainless steel hose is structurally simple – an inner rubber or EPDM tube, stainless steel braiding, and metal fittings. It has no moving parts. If installed correctly, not exposed to vibrations, and operating within a normal pressure range, its lifespan is 10–20 years or more. The main risk is the bursting of the inner tube due to the aging of the rubber or mechanical damage during installation (too sharp a bend, twisting).

Extendable hose – durability

An extendable hose also has a telescopic mechanism – usually an inner spring or a collapsible inner tube. Once set to the correct length and the connections are tightened, the mechanism no longer moves and thus does not function as a "moving part". Its lifespan is comparable to that of a fixed hose, provided the hose is not repeatedly repositioned (which you should not do anyway – the hose is not a toy).

From a safety perspective, the quality of the materials is key, not the type of construction. Certification for potable water, the quality of the stainless steel braiding (at least AISI 304), and pressure testing – these are the decisive factors. More on this topic can be found in the article Stainless steel hoses and potable water – certificates, non-defectiveness, what to watch out for.

Special situations that will influence your choice of length

Toilet cistern

A toilet cistern usually has a connection on the side or from below. The angle valve is typically placed close by – usually 10–20 cm. The actual required hose length (with a bend) is 25–40 cm. The most common mistake: a customer buys a 50 cm hose that twists under the cistern and puts pressure on the connections. For a toilet cistern, a range of 30–60 cm is usually sufficient, and in some installations even a fixed 30 cm hose will do.

Wall-mounted basin (pillar type)

A wall-mounted basin with long connections reaching down under the sink requires longer hoses – usually 60–100 cm, depending on the height of the sink. An extendable hose in the range of 50–100 cm is ideal here – for example, the PROFI S with a range of 50–100 cm and stainless steel fittings covers most installation situations.

Kitchen faucet with under-sink plumbing

If the pipes are built into the wall and the angle valve only protrudes a few centimeters, while the faucet is mounted 60 cm higher, you will need a hose of 65–80 cm. This is a typical situation for modern kitchen setups with under-sink plumbing.

Freestanding sink (pedestal, floor-standing)

The most complicated situation. The pipes run through the pedestal or through the floor, and the distance to the faucet can be 80–150 cm. Extendable hoses with a larger range are practically essential here, or you will need to combine multiple hoses with an extension coupling. For this case, the PROFI MW in the range of 80–160 cm is designed.

Most common mistakes when choosing the hose length

After years of experience in customer practice, we can summarize several mistakes that people repeatedly make:

Purchasing a hose that is too short: The most common mistake. A customer estimates the length by eye and buys a hose "just in case" – then has to go back to the store. Better to measure and add a 10 cm buffer.
Purchasing a fixed hose that is too long and bending it sharply: A sharp bend in a stainless steel hose (with a radius smaller than 5–6 cm) damages the inner tube and creates a risky spot where the hose could burst. A long fixed hose that you have to bend sharply is worse than a properly chosen extendable hose.
Using an extendable hose at the maximum end of its range: A hose stretched almost to its maximum is under unnecessary mechanical stress. If you need 95 cm, do not buy a hose with a range of 50–100 cm, but rather one with a range of 80–160 cm, where you will work comfortably in the middle range.
Ignoring the thread when choosing the length: A customer focuses only on the length and forgets to check the thread. They buy a hose of the correct length but with the wrong thread. More about threads in the article 3/8" or 1/2" thread – how to find out what you need.
Purchasing an extendable hose and repositioning it repeatedly: An extendable hose is not designed for frequent manual length changes. Once installed and the connections are tightened, it remains at that length. It is not a hose for a shower head that you would stretch and shorten every day.

Material and hose surface in the context of length

The length of the hose is also related to its surface finish – and not by chance. Longer hoses that must make a larger bend or pass through a visible area under the sink look more aesthetically pleasing with a plastic coating. Shorter hoses, completely hidden in the cabinet under the sink, can be left in bare stainless steel without any difference.

The plastic coating on the hose also protects the stainless steel braiding from mechanical damage and from condensation of moisture on the cold surface – which is relevant for longer hoses passing through more humid areas. A comparison of plastic-coated and bare stainless steel hoses can be found in the article Stainless steel hose with plastic coating vs. bare stainless steel – which is better.

If you need a medium length (30–60 cm) with a plastic coating, take a look at the PROFI MW in the range of 30–60 cm and with a 1/2" FF thread, which combines a good visual finish with a practical range for standard bathroom installations.

Practical decision tree – what to buy

To avoid memorizing five different rules, here is a simple decision-making process:

Step 1 – Measure the actual required length according to the procedure described above (A + B + 10 cm reserve).
Step 2 – Check the thread on the angle valve and on the radiator. It must match the hose.
Step 3 – Decide: Is your measured length exactly standard (30, 40, 50, 60, 80, 100 cm) and are you sure about the accuracy of the measurement? → fixed hose. Otherwise → extendable.
Step 4 – Choose the range of the extendable hose so that your required length is in the middle range, not at the extremes.
Step 5 – Check the type of fitting (stainless steel or brass) and the hose surface (plastic/polished stainless steel) according to your requirements and the installation location.

Frequently asked questions (FAQ)

Can I shorten or lengthen an extendable hose after installation?

Technically yes – the mechanism allows it before the final tightening of the joint. But after you have properly tightened the joints with sealing tape or gasket, it is better not to disassemble or adjust the hose without a good reason. Every disassembly increases the risk of water leakage when resealing. If you need to change the length, replace the gasket before retightening.

Is an extendable hose safe for drinking water just like a fixed one?

Yes, provided it has certification for drinking water. Certification refers to the materials of the inner tube and the contact surfaces – not whether the hose is fixed or extendable. Always check that the product meets drinking water standards (in the EU typically EN 15768 or the national equivalent).

What if I need a 120 cm hose – can I buy two and connect them?

Connecting two hoses with a coupling is technically possible, but each connection is a potential weak spot. If a single sufficiently long hose (e.g. range 80–160 cm) can be used, it is always a better choice. If it is not possible and the connection is necessary, use a high-quality brass or stainless steel coupling with a gasket and regularly check the installation.

How do I know I have chosen the wrong length – right after installation or later?

Mostly right away. If the hose is too short, it simply cannot reach both connections without excessive tension. If it is too long, it twists and pushes on the connections. Excessive tension or an unusual shape of the hose after installation are signs that another size is needed. Problems caused by the wrong length (such as a kink at the joint, micro-cracks in the gasket) may also appear after several months as slow dripping. More about this issue in the article Why the hose drips or leaks at the joints – causes and repair.

What is the difference between PROFI S and PROFI MW hoses in terms of length?

Both types are extendable, but they differ in surface and fittings. PROFI S has a polished stainless steel surface and stainless steel fittings, while PROFI MW is covered with plastic and has brass fittings. In terms of length selection, this does not matter – the range selection is the same. The decisive factor is the available range of the given model and your requirements for the surface. A more detailed comparison can be found in the article Stainless steel vs. brass fittings – what is the difference and what to choose.

Is there a "safe" universal length that you should buy "in stock"?

If you mean one fixed length for everything – no, it does not exist. But if you want to buy one extendable hose as a stock for most situations in your home, the most universal range is 40–80 cm (1/2" FF), which covers about 70% of standard situations in the bathroom and kitchen. For WC cisterns (3/8") keep the range 30–60 cm.

Conclusion – length is not a minor detail

Selecting the correct length of a stainless steel hose is a technical detail that directly affects the reliability and safety of the entire installation. A hose stretched to the limit of its strength or, on the contrary, sharply bent into a sharp arc is not a safe installation – regardless of how high quality the material is. The correct length will be reflected in long service life, quiet, drip-free operation, and the fact that you will not think about the hose for years.

If you are unsure, it is always better to buy an extendable hose with a sufficient range rather than risk a too short fixed one. Measure the distance, add a reserve, check the thread and choose a range where your required length fits in the middle range. This way you will ensure an installation that will work without problems for years.

Do you have a question about this topic?

Can't decide or are you dealing with a specific situation in your home? Write to us – we are happy to help.