Effective Date: 22-April-2026
Updated on: 22-April-2026

WARRANTY POLICY

1. General provisions

1.1. This Warranty Policy forms an integral part of the Sale-Purchase Agreement.

1.2. Capitalized terms used in this Warranty Policy shall have the meaning assigned to them in the Sale-Purchase Agreement, unless expressly stated otherwise.

2. Scope of Warranty

2.1. The Seller provides a limited commercial warranty (the “Warranty”) for the Products, covering defects in materials and workmanship.

2.2. The Warranty period shall commence from the date engraved on the Product, if such date is available; or if no engraved date is present – from the invoice date issued by Mainlink and provided together with the shipment, following clause 5.5.3 of the Sale-Purchase Agreement.

3. Warranty period

3.1. The Warranty shall expire depending on the type of Product:

72 (seventy two) months – for water meters;

12 (twelve) months – for additional meter accessories;

12 (twelve) months – for LoRaWAN gateways;

72 (seventy two) months – for E3/E4 energy meters;

12 (twelve) months – for sensors.

4. Warranty remedy

4.1. Mainlink’s obligations and the Buyer’s exclusive remedy under this Warranty shall be, at Mainlink’s sole discretion:

  1. repair of the defective Product; or
  2. replacement of the defective Product; or
  3. where applicable, provision of tools and instructions for defect elimination at the place of installation (performed by the Buyer).

4.2. Any replaced Product shall be covered for the remaining Warranty period of the original Product.

5. RMA (return) procedure

5.1. In case of a suspected defect, the Buyer shall notify Mainlink at: support@mainlink.net by submitting a completed RMA form, the template of which is attached to this Warranty Policy.

5.2. Mainlink shall respond to the Buyer within 5 (five) business days by approving the return or

requesting additional information.

5.3. Each defect type must be submitted under a separate RMA form. If the Buyer is going to return more than one defect type (more than one RMA form) at once, it is highly requested to identify Products or separate in different boxes.

5.4. All returned Products must:

  1. include serial numbers;
  2. match the RMA form;
  3. include printed RMA documentation;
  4. be properly packaged.

5.5. Returns without approved RMA shall not be processed and shall be on hold until RMA documentation is in place. In such a case, Mainlink reserves the right to invoice the Buyer for storage handling costs of 250 (two hundred fifty) EUR (or equivalent in USD, if applicable, based on the European Central Bank exchange rate on the invoice date). The applicable currency (USD or EUR) shall be determined in accordance with the law governing the Sale-Purchase Agreement under which the Products are purchased.

5.6. Registered RMA number confirmed by Mainlink shall be valid for 90 (ninety) days. If within this period the Products according to RMA are not shipped, RMA shall be closed.

5.7. The Products with registered and attached printed RMA form should be shipped to:

UAB Mainlink

Ozo str. 12A-1,

LT-08200, Vilnius,

Lithuania

6. Shipping and costs

6.1. The Buyer shall bear all costs of shipping Products to the Seller.

6.2. The Seller shall bear return shipping costs only in confirmed warranty cases. In cases where the defect is not covered under Warranty, return shipment costs shall be borne by the Buyer.

6.3. The Buyer shall bear installation and deinstallation costs, labor and material costs, any costs not directly related to repair/replacement.

7. Warranty evaluation and repair process

7.1. Upon receipt, Products shall be inspected to verify the defect and compliance with Warranty conditions.

7.2.      Following inspection, Mainlink shall determine, at its reasonable discretion, whether (i) the RMA claim qualifies as a valid warranty claim; or (ii) no defect is found in the Product; or  (iii) the defect exists but does not fall within the scope of the Warranty (non-warranty case). In the event of a valid warranty claim, Mainlink shall proceed in accordance with the Warranty obligations set out in this Policy. In the event that no defect is found or the case is classified as non-warranty, Mainlink shall inform the Buyer accordingly, and the Buyer shall bear all costs related to inspection, handling, storage, repair (if requested), and shipping, in accordance with Mainlink’s applicable service rates.

7.3. Products in non-warranty cases or where no defect is found shall be returned without repair unless otherwise instructed by the Buyer, and only after full payment of the applicable costs.

7.4. Repair/replacement timelines shall be agreed with the Buyer where necessary.

7.5. The Buyer shall promptly provide any requested information to avoid delays.

8. Warranty exclusions

8.1. The Warranty shall not apply in the following cases:

  1. Mechanical damage to Products or component;
  2. Unauthorized repair, modification or alteration;
  3. Improper installation, maintenance or use not in line with documentation, instructions and general industry practice;
  4. Damage caused by water quality (sand, debris, impurities, etc.);
  5. Humidity detected inside water meters;
  6. Unauthorized communication/configuration changes;
  7. Damaged warranty seals;
  8. Damaged rubber sealings;
  9. Failures caused by external systems (network, connectivity, providers, etc.);
  10. Excessive exposure to sunlight;
  11. Measurement deviations within legally permitted limits (e.g. MID 2014/32/EU);
  12. Defects arising after risk transfer to Buyer;
  13. Normal wear and tear;
  14. Improper handling, storage or operation;
  15. Damage due to corrosion, voltage issues, lightning, misuse;
  16. Sensor batteries.

9. Additional conditions

9.1. Products must be shipped with a pro forma invoice.

9.2. Products must be packaged to prevent damage during transport.

9.3. Mainlink shall not be responsible for delays caused by insufficient information from the Buyer.

10. Transferability

10.1. The Warranty granted under this Warranty Policy may be transferred to a third party only together with the Product, provided that (i) the Product has been purchased through authorized sales channels, (ii) the Product remains identifiable by its serial number, and (iii) the Buyer or subsequent holder provides valid proof of the original purchase. Mainlink reserves the right to refuse warranty service if these conditions are not met.

11. Final provisions

11.1. This Warranty Policy constitutes the exclusive remedy for defective Products.

11.2. In case of conflict, the Sale-Purchase Agreement shall prevail.

11.3. The applicable Warranty Policy version shall be the one in force at the time of Order placement.

11.4. Mainlink reserves the right to amend or update this Warranty Policy at any time without prior notice. Any such amendments shall apply only to Products ordered after the updated Warranty Policy has come into effect. The Buyer is responsible for reviewing the applicable warranty terms prior to placing the Order.

ANNEX 1

Form of RMA (for water meters, energy meters or meter accessories)

Registration (filled by Seller)

RMA number Date202_ – ____ – _____
Account manager 

Contact Information (filled by Client)

First and Last name 
Company 
Address 
Return Address (if different) 
Phone number 
E-mail 

Returned product information (filled by Client)

No.Order No.Product nameSize (DN)Serial numberReason for return
1     
2     
3     
4     
5     
UAB “Mainlink” Signature:            ____________________ General director Igor Poliščuk______________ Signature:            ____________________ ______________ ______________