Common Issues with Viking Batteries and How to Resolve Them

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Common problems with Viking taps and how to fix them

Viking taps belong to the category of proven mid-range products that, when handled properly, can last trouble-free for ten or more years. Despite this, even high-quality products may eventually experience minor or major issues – dripping, reduced flow, stiff lever or non-functioning thermostat function. Most of these problems can be fixed by a resourceful DIY enthusiast without the need to call a plumber. In this article, we will go through the most common problems step by step, explain their causes, and show specific repair procedures. We will also discuss when it is really better to replace the tap rather than continue repairing it.

If you are unsure which Viking tap you own or how it is assembled, we recommend first reading the article Replacing the washer and cartridge in Viking taps, or Installing a Viking water tap step by step, where the basic structural details are discussed. This will help you better understand the descriptions of the faults below.

1. Dripping from the outlet – the most common problem

A dripping tap is by far the most common problem. Although it may seem like "just a few drops," in practice, it represents a loss of 15–30 liters of water per day at a slower drip rate, and 60–100 liters at a faster rate. Over a month, this adds up to hundreds of liters of unnecessarily lost water and money on the water bill. The causes are usually two: a worn-out cartridge or a damaged seal.

Worn-out cartridge

Lever (single-handle) Viking taps use a ceramic cartridge that controls the mix of hot and cold water as well as the flow. The ceramic plates inside the cartridge have a long lifespan (usually withstand 500,000 opening/closing cycles), but they can be damaged by coarse mechanical impurities in the water, limescale deposits, or wear at higher water pressure. When the cartridge stops sealing, water seeps past the ceramic plates even in the closed position.

Repair: It is necessary to remove the cartridge and replace it with a new one. For Viking taps, it is a standardized size of 35 mm or 40 mm (depending on the model – see the model label or compare with the diameter of the original cartridge). The replacement procedure is described in detail in the article Replacing the washer and cartridge in Viking taps.

Damaged seal (O-ring, gasket)

Older types of double-handle Viking taps use a classic rubber seal (so-called flanged washer or O-ring) instead of a ceramic cartridge. This rubber seal hardens, cracks, or deforms over time, and water seeps past it. Seals are cheap – usually 0.30–1.50 EUR per piece – and replacement is simple. You can buy them at any larger hardware store or order online.

Important: Before selecting a replacement seal, measure the outer diameter (OD), inner diameter (ID), and thickness of the original seal. For example, common dimensions of O-rings in taps: 14 × 2 mm, 16 × 2 mm, 18 × 2 mm. It depends on the specific model.

2. Water leakage under the tap or at the connection

If you see moisture or actual drops under the tap, at the supply hoses, or at the base of the tap, it is a different type of problem than dripping from the outlet. Here are the causes and their solutions:

Loose or damaged supply hoses

Supply hoses from the tap to the angle valves (usually braided stainless steel, length 30–60 cm) have threaded connections at both ends. If the nuts are loose or the seal (usually a flat rubber ring) has hardened and cracked, water seeps through the connection. Solution: Tighten the nuts (not excessively, just "firmly by hand + 1/4 turn with a wrench"), or replace the flat seal. If the braiding of the hose is cracked, replace the entire hose – the risk of bursting and flooding is too high.

Loose tap connection nut

The tap itself is attached to the sink, basin, or countertop using mounting nuts from below (so-called cup washer or mounting plate). If this nut becomes loose, the tap moves and the damaged base seal causes a leak. Solution: Tighten the mounting nut using a special tap wrench (so-called "monkey wrench" or plastic mounting wrench), or replace the base seal.

Cracked tap body

This is less common, but it does happen – especially if the tap froze (for example, in a cabin or in an unheated space). A cracked metal tap body (brass, zinc alloy) cannot be reliably repaired. In this case, the only sensible option is to replace the entire tap. When choosing a new one, also see the article Dimensions and connection of Viking taps: what to check before purchase, so you buy a type with the same connection spacing (standard 150 mm for sink and kitchen taps).

3. Stiff lever – difficult turning or sliding

If you have to exert effort to turn the lever or it "jams", this is a problem mainly in areas with hard water (most of Slovakia has medium-hard to hard water, 2–4 mmol/l). Limescale deposits on the moving parts of the cartridge, on the outer casing and inside the head of the faucet.

Procedure for a stiff lever

Close the water supply (angle valve or shut-off valve on the riser).
Unscrew the lever cover (usually under the decorative cover is a screw, most often 3 mm or 4 mm hex key).
Remove the lever and clean the cover plate.
Remove the cartridge. Check if it is whitened by limescale – this is a typical problem.
Place the cartridge in a solution of vinegar water (1 part vinegar + 3 parts water) for 2–4 hours. Vinegar will dissolve the limescale.
After removing the cartridge, gently clean it with a soft cloth, rinse with clean water and apply a thin layer of silicone lubricant (not oil-based – it damages the rubber).
If the cartridge remains stiff or is visibly damaged, replace it with a new one.

Tip from practice: If the problem of a stiff lever repeats every 6–12 months, invest in a water softener or filtration system. Hard water brings with it other problems – clogging of shower heads, reduced lifespan of water heaters, deposits in pipes.

4. Loose lever or lever that does not stay in position

The opposite problem is a lever that is too loose, "sways" or does not stay in the set position. The causes are two:

Loose lever screw: Under the decorative cover is a fixing screw (most often hex key 3 mm or 4 mm). It is enough to tighten it. Caution – do not over-tighten to avoid cutting the thread in the softer material (zinc alloy).
Worn cartridge: If the ceramic cartridge is mechanically damaged or worn, it cannot maintain the set lever position. The solution is to replace the cartridge.

5. Weak water flow – low pressure from the faucet

This problem is manifested by the fact that water flows out of the faucet weaker than it should – even though the pressure in the entire apartment's water supply is normal. There can be several causes:

Clogged aerator (mesh air inlet)

The aerator is a small screw-on fitting at the end of the faucet outlet. Inside it is a mesh filter that aerates the water flow and gives it a "soft" character. However, this mesh gets clogged with limescale deposits and dirt. Cleaning is simple:

Unscrew the aerator (standard thread M22 × 1 or M24 × 1 – depending on the faucet).
Disassemble it into parts – mesh, rubber gasket, plastic/metal diffuser.
Soak them in vinegar for 30–60 minutes.
Gently clean with a cloth and rinse.
If the mesh is too deformed, buy a replacement aerator (price 1–3 €, available in any hardware store according to the thread size).

Interesting fact: A clogged aerator can reduce water flow by 60–70 % of the original value, while a replacement aerator can be replaced in 5 minutes for a few cents.

Clogged mesh filters on the faucet inlets

On the inlet nozzles of the faucet (where the supply hoses are connected) there are small mesh filters – baskets with a diameter of approx. 10–12 mm. Their task is to catch coarse impurities from the pipes. If not cleaned regularly, they also get clogged. Procedure: Close the water supply, unscrew the supply hoses, use tweezers to remove the mesh and clean it or replace it. It is good to clean them every 2–3 years as a preventive measure, or whenever a repair has been done in the system (repairs bring impurities and debris into the pipes).

Pressure problem in the system

If the flow is weak in all faucets in the apartment at the same time, the problem is not in the faucets, but in the system or pressure reduction. The normal operating pressure in apartments is 2.5–4 bar. If the pressure drops below 1 bar, the faucets (especially thermostatic ones) do not function properly. In such a case, it is necessary to contact the building manager or water utility.

6. Viking thermostatic faucet does not set the correct temperature

Viking thermostatic faucets are more sophisticated than lever faucets, and therefore have some specific faults. The thermostat inside contains a temperature-sensitive element (usually a wax cartridge or bimetallic joint), which automatically reacts to changes in water temperature. Common problems:

Thermostat does not set the desired temperature (water too cold or hot)

If the thermostat constantly delivers water that is colder or hotter than the set position, the thermostat needs recalibration. Most Viking thermostats have an adjustable temperature limit – a small plastic/metal limiter on the thermostatic valve or under the handle, which ensures that the handle does not go beyond 38 °C (safety position). If this limiter has shifted or been removed, the thermostat does not regulate properly. Procedure: refer to the installation manual for the specific model (usually included, or available on the manufacturer's website), and set the calibration according to the instructions – usually it involves turning the limiter at a set temperature of 38 °C by a few notches.

The thermostatic cartridge is worn or jammed

After 7–12 years of use, the thermostatic cartridge may become worn – the wax component loses its elasticity or the mechanism jams. This is evident when the thermostat no longer reacts to changes in the set temperature, or reacts with a significant delay (more than 30 seconds). In this case, it is necessary to replace the entire thermostatic cartridge (thermostatic cylinder). This is a component specific to the model of the tap – we recommend purchasing only original spare parts or verified compatible replacements.

If you are considering whether it is worth repairing the thermostatic tap or buying a new one, read the article Tap with lever vs. thermostatic Viking tap: which one is suitable for your case.

Thermostatic tap "vibrates" or makes noise

Vibrations or tapping at a thermostatic tap are usually a sign that the water pressure is too high (over 5 bar), or that the pressure difference between hot and cold water is too large (more than 2 bar). Solution: install or adjust a pressure reducer on the water supply. The optimal pressure for thermostatic taps is 2–4 bar, with a maximum pressure difference of 1:2 between the hot and cold lines.

7. The tap "sings" or makes a whistling sound during flow

Whistling or squeaking during water flow is a problem that can have several causes:

Worn or deformed cartridge: When the ceramic surfaces of the cartridge are not smooth, water flowing through them "squeaks". Solution: replace the cartridge.
Partially closed angle valve: If the angle valve (regulator) is not fully open, the water flow is restricted and a squeaking sound occurs. Solution: fully open the supply.
Clogged aerator: A partially clogged aerator can produce sound during flow. Solution: clean the aerator (see above).
Water pressure is too high: At pressures over 6 bar, the tap may resonate. Solution: pressure reducer.

8. The lever returns to the middle position by itself

Some Viking taps (especially kitchen taps with a high spout) have taps with so-called self-closing cartridges – after releasing the lever, it returns to the closed position by itself. This is an intentional feature for certain types of installations. However, if this happens with a standard lever tap, where the lever should remain in the set position, it is a problem of a worn or incorrect cartridge. Check whether the replacement cartridge you may have installed is accidentally of the self-closing type (marked SC – self-closing). If so, replace it with a standard cartridge of the same size.

9. Leaking sprayer handle – faults in Viking bath taps

Viking bath taps (bath + sprayer, so-called bath sets with a sprayer branch) also have a switch between the spout and the sprayer hose, as well as the sprayer accessories themselves. Typical faults:

The diverter switch does not work properly or does not stay in place

The diverter (usually push or rotary) controls where the water flows – into the bath or the sprayer hose. If the diverter does not hold the position, water flows from both outlets at the same time, or it refuses to switch. Cause: wear of the rubber seal inside the switching mechanism. Solution: unscrew the diverter (usually a simple disassembly without tools) and replace the rubber seal. The dimensions vary by model – when buying a seal, bring the original one with you.

The sprayer hose drips or bends

Sprayer hoses (usually 150 cm or 175 cm long) drip when connected to the tap or to the sprayer head due to wear of the flat seal (inside the nut connection). Replacing the seal takes 2 minutes. If the hose itself cracks or breaks (PVC hoses older than 10 years), replace the entire hose – stainless steel braided hoses are more durable and safer.

10. Corrosion and surface damage – when the tap is "beyond repair"

The bathroom environment is aggressive – humidity, cleaning agents, limescale. Viking taps in chrome or other surface finishes are protected by a layer that also has its lifespan. If you notice:

Brown or green stains on the chrome surface: This is corrosion of the base material (usually brass or zinc alloy). Stains "under the chrome" layer cannot be prevented without a complete surface renovation, which is not economically viable for standard taps.
Peeling chrome: The surface layer peels off due to mechanical damage or the use of aggressive acids for cleaning. Peeling chrome is a definitive sign that the tap should be replaced – it cannot be repaired.
Black or gold surface finish has lost its color: PVD (physical vapor deposition) surfaces are more durable, but they can also lose color locally. Learn more about the durability of different finishes in the article Surface Finishes of Viking Taps: Chrome, Black, Gold – What Lasts in the Bathroom.

In general: if the tap is older than 10–12 years and is corroding, problems with it are recurring, and spare parts are hard to find, it is more economical to buy a new one. An investment in a new tap from Viking taps available at atria.sk is more cost-effective at current prices than repeatedly fixing an old one.

11. Hydraulic Frame and Causes of Hidden Faults – Water Pressure and Hardness

Many faults in Viking taps (and taps in general) are not related to their quality, but to the conditions in which they operate. From practice, it follows that two-thirds of premature faults are caused by unsuitable operating conditions:

Too High Water Pressure

The normal operating pressure for taps is 1–5 bar (typically 3–3.5 bar in apartment buildings). Pressure above 6 bar causes accelerated wear of the cartridge, vibrations, whistling, and faster wear of seals. Solution: installation of a pressure-reducing valve after the main shut-off valve of the apartment (cost 20–50 €, installation is simple).

Hard Water (High Content of Ca²⁺ and Mg²⁺)

In Slovakia, most areas are supplied with moderately hard to hard water. At hardness above 3 mmol/l (168 mg/l CaCO₃), calcium deposits on the ceramic plates of the cartridge, in the aerator mesh, and on the internal surfaces of the tap. Higher hardness reduces the lifespan of the cartridge from 10+ years to 3–5 years. Solution: regular preventive cleaning (descaling) and possibly installation of a magnetic or electronic water softener.

Aggressive Cleaning Products

Acidic degreasers or strongly alkaline cleaners for sink/basin cleaning can damage the chrome surface of the tap and the rubber seals inside the tap. Use only gentle neutral products or specialized sanitary cleaning products for cleaning Viking taps (and generally chrome taps). A detailed cleaning procedure without damaging the tap can be found in the article Cleaning and Maintenance of Viking Taps: How to Extend Their Lifespan.

12. Repair vs. Replacement – When What Makes Sense

This is a practical question for which there is no universal answer, but from practice the following applies:

Situation	Recommendation
Tap under 5 years, minor fault (seal, aerator)	Repair – it is worth it, spare parts are cheap
Tap 5–10 years old, worn cartridge	Replace the cartridge – the tap still functions well
Tap over 10 years old, surface corrosion, repeated faults	Replace the entire tap
Cracked body, broken part, frozen tap	Replace the entire tap – repair is not possible
Thermostatic tap, worn thermal insert	Replace the thermal insert if available, otherwise replace the tap

Common Questions (FAQ)

Why does my Viking tap drip immediately after closing, but then stops?

This is a common occurrence and does not necessarily indicate a fault. After closing the handle, residual water under pressure remains inside the tap and in the outlet arm, which drips out. If dripping lasts more than 5–10 seconds after closing or the flow is visible, it is a worn cartridge or seal that needs to be replaced.

Can I use any 35 mm cartridge, or do I have to buy original Viking?

Ceramic cartridges are largely compatible between different manufacturers if the dimensions match (diameter 35 mm or 40 mm, height, orientation of outlets). In Slovakia, compatible cartridges from good sources (e.g., Sedal, Kerox) are commonly available and work reliably. For certainty, compare the original cartridge with the height, diameter, and type of neck (single-sided, double-sided, three-way). For thermostats, we always recommend the original thermal insert, as temperature calibration is more accurate.

My Viking tap squeaks every time I open it – is this normal?

No, squeaking is not normal. The most common cause is a lack of lubrication on the ceramic cartridge or metal moving parts. Solution: remove the cartridge, clean it, and apply silicone lubricant (not WD-40 or oil-based lubricants – they damage rubber), reassemble, and the problem should disappear. If the squeaking persists, the cartridge is worn and it is time to replace it.

After replacing the cartridge, the tap still drips. What am I doing wrong?

Check a few things: (1) Is the cartridge properly seated and rotated – a poorly seated cartridge won't seal even if it's new. (2) Is the cartridge seat inside the tap body damaged – limescale or mechanical damage to the seat can prevent even a new cartridge from sealing; the seat can be cleaned with a soft wet cloth. (3) Is the water supply really closed during installation? (4) Do you have an SC (self-closing) cartridge instead of a standard one? If everything is in order and dripping persists, the problem may be in a damaged tap body or a pressure issue in the plumbing.

How long does a cartridge in a Viking tap last?

Under normal operating conditions (pressure 2–4 bar, moderately hard water, normal use 3–6 × daily), a ceramic cartridge lasts 8–15 years. In harder water and higher pressure, the lifespan shortens to 4–7 years. Plastic and rubber seals in older two-handle taps have a shorter lifespan – usually 5–8 years, after which preventive replacement is recommended.

Can I repair a bathtub mixing valve myself, or is it better to call a plumber?

Disassembly and replacement of the seal in a mixing valve (the most common repair for bathtub taps) is manageable without special knowledge. The entire valve is usually unscrewed by hand or with a simple wrench, the seals are cheap and available. It is advisable to call a plumber only if the valve cannot be disassembled (blocked by limescale), if there is suspicion of a bigger problem in the connections, or if something breaks during disassembly.

Conclusion – You Can Fix Most Faults Yourself, but Know When to Stop

Viking taps are structurally simple and repairable products. Most faults you may encounter – dripping from the outlet, stiff lever, weak flow, leakage at the connections – have simple and cheap solutions that even a layperson can handle with a minimal set of tools. The key is correct diagnosis (determining where and what is dripping) and purchasing the right spare parts (correct size of the cartridge or seal).

If you are unsure about the choice of tap after repair or are considering a complete replacement, take a look at the offer Viking taps at atria.sk, where you will find a complete range for the bathroom and kitchen. For a deeper understanding of the function and selection, we also recommend other articles in the Knowledge Centre – for example How to choose Viking taps for the bathroom and kitchen or Viking water-saving taps: ecological and economic options. A good repair is one that you do once and properly.

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.