Service, Warranty, and Technical Support for TENKA Pneumatic Spray Guns

TENKA pneumatic spray guns benefit from the protection provided by applicable legal product conformity regulations and, where provided, the commercial warranty granted by the manufacturer.

The legal warranty of conformity protects buyers acting as consumers against non-conformities for which the seller is responsible under the law. This is distinct from any additional commercial warranty, which may offer benefits beyond legal rights.

For each request, we analyze the nature of the reported issue, the operating conditions, and the technical characteristics of the product in order to determine the appropriate solution.

In the event of a malfunction, we recommend stopping the use of the equipment and performing a preliminary visual check, without disassembling components that could compromise product safety or integrity.

The first step is to identify the symptom: air leakage, reduced spraying performance, a clogged nozzle, a damaged fitting, or a structural defect.

The customer can send the TENKA team a description of the problem, along with photos or a short video. Based on this information, a preliminary technical assessment can be conducted.

If the issue cannot be identified remotely, a physical inspection of the product may be required. The final solution depends on the result of the inspection and the buyer’s applicable rights.

Technical assistance can be requested through the official TENKA contact page.

For correct product identification, we recommend mentioning the model, purchase date, observed symptoms, and the conditions under which the issue occurred.

In the case of intermittent malfunctions, a video recording the equipment’s behavior can help determine the cause.

A pneumatic spray gun should not automatically be considered unusable when a fault occurs or when the warranty period expires.

From a technical standpoint, many issues can be fixed by cleaning components, replacing seals, swapping worn parts, or repairing damaged assemblies when such an intervention is safe and economically justified.

The actual feasibility of repair depends on the model, the nature of the malfunction, parts availability, and the general condition of the equipment.

TENKA directly performs out-of-warranty repairs for a fee and provides spare parts and technical support.

Customers who purchase TENKA products from other European countries can submit technical support requests using official contact channels.

If the verification requires physically shipping the equipment, the procedure must be established depending on the country of origin, the type of claim, and available shipping methods.

Consumers’ legal rights remain applicable according to relevant legislation. The terms of any additional commercial service may differ and must be communicated transparently.

TENKA actively accepts products for repair from all 27 EU member states.

For consumers purchasing products from a trader within the European Union, the European framework generally provides a minimum period of two years of seller liability for product non-conformity. Specific application is determined by relevant national legislation and the circumstances of the purchase.

In Romania, the legal warranty of conformity is mainly regulated by GEO no. 140/2021, as amended.

Yes, the legal regime may differ.

Individuals purchasing products as consumers benefit from the specific rights outlined in consumer protection legislation.

Purchases made for professional purposes by commercial entities, sole traders, or other economic operators are generally subject to contractual rules and applicable civil or commercial law.

Therefore, commercial warranty terms offered to professional buyers can be established separately, without affecting the mandatory rights applying to each category.

For individuals, the warranty is 24 months for all Tenka products, while for commercial entities, the warranty is 12 months.

For the legal warranty of conformity, the relevant point in time is generally the date of product delivery to the consumer, according to applicable law.

The invoice issuance date may coincide with the delivery date, but the two are not necessarily identical.

In the case of an additional commercial warranty, its terms must explicitly specify the date from which coverage begins.

To identify the purchase and handle a claim efficiently, we recommend presenting the invoice, order confirmation, or another document allowing transaction verification.

Additionally, the product model, photos of the defect, and a description of how it manifested are helpful.

A request should not be automatically rejected solely because a specific document is missing, provided the purchase and consumer rights can be proven through other legally accepted means.

Consumer conformity rights are regulated at the European level through harmonized rules transposed into national laws.

For cross-border purchases, effective rights and the method of exercising them depend on the contract, the identity of the seller, and applicable legislation.

A TENKA commercial warranty may have a separately defined territorial scope, which must be communicated to the buyer prior to purchase.

The warranty offered by our company covers the entire territory of the EU.

Losing the invoice does not automatically mean losing the buyer’s legal rights.

If the purchase was made through our online store, order details may allow transaction identification, provided they are available in commercial records.

The customer can provide the email address used during the order, the order number, or other relevant information to identify the purchase.

Manufacturing defects that cause product non-conformity and for which the seller is responsible by law can be remedied free of charge for the consumer.

From a technical standpoint, a manufacturing defect may stem from material non-conformity, a processing error, an improperly executed joint, or a dimensional deviation affecting normal equipment operation.

Identifying such an issue requires analyzing the affected component, the mode of failure, and operating conditions.

The mere occurrence of a malfunction does not automatically prove the existence of a manufacturing defect, nor does it exclude that possibility.

The structural integrity of a pneumatic spray gun is essential for safe operation.

If a crack, deformation, or failure of a welded joint occurs, use of the equipment must be stopped immediately, and the compressed air supply disconnected after safely depressurizing the line.

Technical verification may check for joint defects, porosity, cracks, mechanical deformations, impact marks, or stresses exceeding design parameters.

If a non-conformity for which the seller is responsible is identified, legal remedies apply.

We do not recommend that users weld, straighten, or modify structural components of the spray gun themselves. Uncontrolled repairs can compromise mechanical strength and equipment safety.

A delivered product must conform to contractual specifications and legal compliance requirements.

If the spray gun has missing components, damage, functional deficiencies, or other non-conformities existing at the time of delivery, the buyer can request remedies provided by law.

We recommend inspecting the product upon receipt and reporting any issues as quickly as possible to facilitate documentation of the situation.

This recommendation does not reduce legal timeframes or consumer rights.

Diagnosis aims to identify the technical cause of the failure, not just the component that stopped working.

Depending on the problem, verification may include visual inspection, analysis of damaged surfaces, dimensional checks, seal integrity, wear, and potential material buildup.

For example, a damaged component may show characteristic signs of impact, abrasion, corrosion, overload, or material defect. Interpretation must be done within the context of actual operating conditions.

Technical assessments are conducted following legal rules regarding the burden of proof and presumptions of non-conformity. A technical conclusion cannot eliminate legal buyer rights.

In the case of a non-conformity for which the seller is liable, the consumer can benefit from bringing the product into conformity through repair or replacement under legal conditions.

In certain situations, a proportional price reduction or termination of the contract, including refund of corresponding amounts, may become applicable.

The specific solution is determined based on the nature of the non-conformity, consumer request, and legal conditions regarding proportionality, impossibility, or failure of remedy.

During spraying, mortar and other compatible materials come into contact with the inner surfaces of the equipment.

Mineral particles, especially high-hardness ones, can cause abrasion on components directly exposed to material flow.

Depending on the model construction, wear-susceptible components may include nozzles, sealing elements, contact surfaces, and moving parts.

The rate of wear depends on material grain size, frequency of use, operating pressure, and maintenance performed.

Normal wear and tear resulting from use does not in itself constitute a manufacturing defect. However, a consumable or wear part can still exhibit a non-conformity covered by law.

Cement-, lime-, or binder-based materials can set and harden over time.

If mortar remains inside the equipment after use, solidified deposits can restrict flow channels, block nozzles, or mechanically strain components during cleaning attempts.

Damage caused exclusively by a lack of proper maintenance does not typically represent manufacturing defects.

However, each situation must be analyzed individually, including determining whether usage and cleaning instructions were adequate.

Failing to remove residual material can cause buildup, blockages, and progressive degradation of spraying performance.

As the material hardens, removal becomes more difficult and may require mechanical interventions that risk damaging functional surfaces.

We recommend immediate cleaning after completing work, using the procedure and tools specified for that model.

We do not recommend using sharp objects, striking components, or applying excessive force to remove deposits.

A mechanical impact can cause hopper deformation, fitting damage, joint cracking, or altered component geometry.

Damage caused exclusively by accidents occurring after delivery does not normally constitute non-conformity attributable to manufacturing.

However, if there are indications that damage was facilitated by a pre-existing non-conformity, the situation must be evaluated accordingly.

Equipment that has suffered a severe impact must not be put back into operation before verifying its integrity.

Compressed air pressure influences material discharge speed and stresses placed on pneumatic components.

Exceeding the maximum allowed pressure can increase stress on fittings, seals, and other components, depending on equipment design.

Operation must strictly remain within the pressure range specified in model documentation.

Damage demonstrably caused by operating outside technical limits may not be covered by warranty, without affecting legal rights for non-conformities independent of such use.

Altering nozzle geometry, replacing components with incompatible parts, or tampering with structural elements can affect equipment function and safety.

We recommend using compatible components and having complex procedures performed by qualified technical personnel.

An unauthorized modification does not automatically void all legal product conformity rights. A link must be established between the intervention performed and the reported fault, under applicable law.

An absence of spraying does not necessarily indicate a defective gun. In many cases, the cause can be identified by checking the compressed air supply, material consistency, and nozzle condition.

Pneumatic mortar spray guns work by using compressed air energy to drive and project material. For proper operation, both recommended working pressure and required airflow must be ensured.

Preliminary checks include:

• Checking for compressed air supply and proper compressor operation.
• Available pressure at the spray gun inlet during operation, not just compressor resting pressure.
• Hose integrity and absence of kinks or air leaks.
• Nozzle cleanliness and absence of hardened material.
• Mortar consistency and compatibility with the equipment.

If air flows normally but material is not fed properly, check mix viscosity, particle size, and spray line geometry.

Warning: Before any intervention on nozzles or fittings, shut off the air supply and fully depressurize the system.

Uneven spraying can manifest as an interrupted jet, variations in projected material density, or non-homogeneous distribution on the work surface.

Possible causes include pressure variations, insufficient airflow, inconsistent mortar mix, oversized particles, and partially clogged nozzles.

Inadequately mixed mortar can contain clumps that disrupt feeding. Additionally, a compressor with insufficient airflow can cause pressure drops during spraying, even if initial pressure seems adequate.

We recommend uniform material preparation, following mortar manufacturer specifications, and checking continuous pneumatic supply.

Air leaks occur when the seal between two pneumatic circuit components is no longer adequate.

Possible causes include loose connections, damaged gaskets, incompatible fittings, worn threads, or mechanical component damage.

Inspection must follow safety procedures. After isolating and depressurizing the line, examine fittings and seal elements.

If maintenance procedure permits, a leak can be located using a leak detector solution applied externally, without introducing it into the spray circuit.

We do not recommend overtightening fittings, as this can strip threads or deform sealing surfaces.

Nozzle clogging is frequently associated with oversized particles, material clumps, or buildup from hardening mortar.

Nozzle diameter and geometry affect material flow and spray pattern. Using mortar with incompatible aggregate sizes can cause repeated blockages.

To prevent clogging, use compatible materials, mix thoroughly, and avoid prolonged breaks where mortar can start setting inside the equipment.

Nozzle cleaning should only be performed after disconnecting and depressurizing the pneumatic supply, using tools that do not alter orifice diameter or geometry.

We do not recommend enlarging nozzles by drilling or other mechanical operations not intended by the manufacturer.

Air consumption depends on gun construction, nozzle number and diameter, operating pressure, and usage mode.

Higher pressure does not automatically guarantee more efficient spraying. Under certain conditions, it can lead to extra air consumption, excessive material overspray, and mortar waste.

It is important to differentiate between pressure, expressed in bar, and airflow rate, usually expressed in liters per minute (l/min).

A compressor may reach required tank pressure but fail to deliver sufficient airflow for continuous spray gun operation.

When choosing a compressor, consider actual delivered airflow at operating pressure, not just theoretical intake displacement declared by the compressor manufacturer.

A weak spray jet can indicate insufficient pressure at the gun, air leaks, hose restrictions, partially clogged nozzles, or improper mortar consistency.

For diagnosis, we recommend checking dynamic pressure—the pressure measured during active air consumption.

An overly long hose or insufficient inner diameter can cause significant pressure drops, especially at high airflow rates.

If pressure drops immediately when triggering the gun and the compressor runs continuously without maintaining it, delivered airflow may be insufficient.

The appearance of a crack in a structural component is a reason to stop use immediately.

We do not recommend continuing work, applying makeshift repairs, or testing component strength by increasing pressure.

The product must be safely disconnected from the pneumatic supply and examined to identify the affected area.

For technical assessment, the customer can send clear photos of the crack, the overall equipment, and the damaged area.

Depending on results, it can be determined whether the part can be replaced or if another technical solution is required.

For accurate diagnosis, we recommend analyzing the three system elements separately: spraying equipment, compressed air source, and material used.

These observations serve as guidance. Determining the exact cause may require further inspection.

To request technical support, we recommend using the contact details published on the official TENKA website.

In your message, describe the issue as precisely as possible and specify whether the fault appeared during first use, after a period of operation, or following a specific event.

This information helps us identify required checks faster and avoid unnecessary shipping of the equipment.

To identify the equipment, we recommend providing the exact model, order or invoice number, approximate purchase date, and observed symptoms.

Information regarding the type of mortar used, compressor model, working pressure, and conditions under which the fault occurs is also helpful.

If the fault is intermittent, specify the frequency and circumstances under which it manifests.

Photos and videos are not mandatory in all situations, but they can significantly facilitate identifying a fault.

For visible damage, we recommend overview photos and detailed images of the affected area.

For functional issues, a short video can highlight equipment behavior, provided recording can be done safely.

Do not attempt or request tests on equipment with cracks, structural damage, or potentially hazardous air leaks.

Certain issues can be preliminary assessed by analyzing symptoms and information provided by the user.

For example, a pressure drop, incompatible material, or a clogged nozzle can sometimes be identified without physical examination of the product.

However, remote assessment cannot always replace a technical inspection. Especially in cases of cracks, deformations, and structural faults, direct examination may be necessary.

Physical examination may be necessary when the defect cannot be identified from available information, when structural components are affected, or when dimensional/functional verification of an assembly is required.

Additionally, the product may require verification when resolving a conformity claim requires direct inspection of the problem.

Drop-off or shipping procedures are established according to applicable guidelines without imposing costs on the consumer that legally belong to the seller.

After submitting a request, the customer should be able to identify how they will receive the response and information necessary to continue the procedure.

Before shipping, we recommend contacting the TENKA team to confirm the address and information required to identify the parcel.

The shipping address for service may differ from the registered office address or official correspondence address of the company.

We recommend contacting the TENKA team prior to sending so the customer receives instructions on packaging, documentation, and shipping methods.

This step facilitates parcel identification and can prevent sending products for issues solvable through technical guidance.

However, internal administrative procedures must not limit the exercise of legal consumer rights.

In the case of non-conformity for which the seller is responsible under consumer protection laws, bringing the product into conformity must be done at no cost to the consumer, including necessary transport expenses when falling under legal obligations of the seller.

For other commercial warranty types or professional purchases, applicable conditions must be established in contractual documentation.

For paid repairs, shipping costs must be communicated prior to accepting the service. These may vary depending on destination country, parcel weight, and courier service. The customer must be informed of estimated costs before assuming payment obligations.

Before packaging, disconnect the spray gun from the pneumatic system, fully depressurize it, and clean residual materials to the extent that it can be done safely.

Do not ship equipment containing wet mortar, unstable residue, or pressurized components.

To protect during transport, we recommend using a rigid box, cushioning materials, and securing equipment to prevent movement.

Protect nozzles and fittings against impacts, and seal the package properly.

If the fault prevents safe cleaning, the customer should request instructions before attempting intervention.

In general, it is best to send only components necessary to inspect the fault.

For example, a sealing issue may require inspecting the affected fitting, while a spraying issue may require checking nozzle assemblies.

The customer should receive instructions regarding accessories to include in the package.

Technical requests from other European countries can be submitted through official contact channels.

Before shipping, recipient address, transport method, and country-specific instructions must be established.

Within the European Union, standard goods transport between member states generally does not involve customs import formalities comparable to non-EU shipments.

Upon receiving the equipment, verifying product identity, parcel condition, and accompanying documents is recommended.

Receipt confirmation lets the customer know the product arrived safely and technical evaluation can begin.

Diagnosis duration depends on the nature of the fault.

Visible problems, such as a damaged fitting or clogged nozzle, may require simple checks.

Intermittent faults or structural damage may require further inspection, measurements, and component checks.

Repair time depends on intervention complexity, parts availability, and necessary technical procedures.

For consumer conformity claims, timeframes and conditions specified by applicable laws must be respected.

For paid repairs, estimated times must be communicated before accepting intervention or as soon as the work scope is established.

If the intervention requires a component that is not immediately available, the customer must be informed of the situation and estimated lead time.

In the case of a paid repair, any changes in price or deadline must be communicated before continuing work.

Temporary unavailability of a part does not relieve seller legal obligations regarding non-conformity remedies.

Communication should allow the customer to know whether the product is in receipt, diagnosis, parts waiting, repair, or shipping stage.

If repair is impossible, unsafe, or cannot be performed under legal conditions, other applicable remedies must be evaluated.

For non-conformity covered by consumer protection law, these may include product replacement, proportional price reduction, or contract termination, under legal conditions.

For out-of-warranty equipment without other applicable legal rights, the customer must be informed of repair impossibility and available alternatives.

From a design standpoint, many pneumatic equipment faults can be fixed without replacing the entire product.

Depending on the model, interventions may include replacing nozzles, seals, fittings, or other detachable components safely.

However, repair feasibility depends on fault type, parts availability, and overall equipment condition.

Intervention costs may include replacement parts price, labor, testing operations, and potential shipping expenses.

An accurate estimate requires identifying defective components and determining necessary procedures.

For defects that cannot be evaluated from photos, a final price may require physical equipment examination.

No fee is charged for diagnosing a defect or operating symptom of a Tenka product. Out-of-warranty diagnosis is also free, but courier fees are entirely covered by the customer.

When damage is extensive or essential components cannot be safely replaced, repair may become impossible or economically unjustified.

In such a situation, we recommend evaluating replacement cost against repair value. A product with unrepairable structural damage must not be returned to service.

Rights regarding parts and repair services depend on intervention nature, contract terms, and applicable law.

A repair performed to remedy a legal non-conformity should not be confused with an independent paid repair service.

Depending on equipment design, certain components can be replaced individually without changing the entire gun.

This option is especially important for parts subject to wear, accidental damage, or material buildup.

Part compatibility must be verified prior to ordering, as differences in diameter, thread, geometry, or material can affect operation.

Identification should start from the exact model name and, where applicable, the design version.

For example, for TENKA TK-31R and TK-31N models, part compatibility with the technical configuration must be verified, not just external appearance or color.

A photo of the component and relevant dimensions can help identification, but do not replace specification checks.

Component availability depends on model, manufacturing period, and existence of compatible parts.

Before ordering a component for an older model, we recommend sending photos and exact equipment naming.

Cleaning after use is one of the most important maintenance operations for mortar spraying equipment.

When work is finished, turn off compressed air, depressurize the system, and remove residual material before hardening.

For water-washable materials, cleaning includes removing mortar remnants and washing contacting surfaces according to model instructions.

Pay close attention to nozzle orifices, joint areas, and surfaces where deposits build up.

We do not recommend uncontrolled introduction of water or chemical solutions into components not designed for them.

After cleaning, inspect, dry, and store the equipment properly.

Mortar based on mineral binders can form hard, stubborn deposits once setting begins.

These deposits reduce material passages, alter spray patterns, and make component disassembly difficult.

Aggressive mechanical removal can damage functional surfaces, especially calibrated nozzle orifices.

If material has severely hardened, evaluate cleaning methods based on mortar type and gun construction materials.

Do not use acids, harsh solvents, or chemical agents without confirming compatibility with equipment materials and seals.

Nozzles must be inspected periodically for buildup, deformation, uneven wear, and mechanical damage.

A deformed or enlarged orifice due to wear can alter discharge volume and spray pattern.

Fittings must be inspected for cracks, thread damage, loose connections, and seal wear.

Checks requiring disassembly must be performed strictly after complete system depressurization.

Spray gun performance depends on compatibility between equipment and compressed air source.

Pressure represents air force level provided, while airflow rate indicates volume available over time.

Both parameters are important. A compressor with high max pressure but insufficient airflow can cause performance drops during continuous operation.

We recommend sizing compressors based on actual delivered airflow at required pressure, accounting for hose, fitting, and regulator losses.