The piping systems with thin copper tubes with an external solid fixed plastic covering are intended to be applied in:

  • Sanitary installations (in buildings) for the transport of warm and cold drinking-water;
  • Hot water heating systems (temperature not exceeding 100 ºC, recommended operation temperature between 70 ºC and 95 ºC);
  • Under floor heating systems;
  •  Cooling systems.

The external covering is primarily intended for the chemical and mechanical protection of the pipe surface during transportation, installation and service. In addition, the covering can be used for providing a thermal insulation for the pipe. In the latter case the covering shall meet the additional materials requirements as specified. Under the certification products we understand the copper tubes with an external fixed plastic covering with the fitting, the combination, copper tube and fittings are listed on the product certificate

Steps to obtain a certificate with the Kiwa Water Mark are:
1. Fill in an application form and send it to Kiwa (application form is located on the right side);
2. Kiwa sends a quotation, which is at the same time a concept-agreement, drawn up according to the requirements of the guideline;
3. After mutual signing of the quotation, the agreement is definitive and the initial audit can start;
4. After positive results of the initial audit, the certificate will be issued;
5. The certificate is valid indefinitely;
6. Periodic audits are part of the agreement.

Important aspects of the initial audit (steps 3 and 4) include:
a. Testing with regard to the product and/or performance requirements. Testing, often carried out in our own laboratories, demonstrates that the product meets the certification requirements for functional and hygienic aspects, such as durability, dimensions, composition of materials, etc.;
b. Assessment of the production process, quality system and internal quality control (IQC) scheme. To ascertain that the producer is continually able to manufacture products that meet the certification requirements.

The periodic audits aim at the maintenance of the management system, in order to maintain confidence that the producer is still able to manufacture products that meet the certification requirements. The periodic audits include functional and hygienic tests of the certified products. The audit frequency varies from product group to product group: in general, two to four times per year.

Conditions for the certification process are stated in the Kiwa Regulations for Product Certification and the General Terms and Conditions of Kiwa for the performance of orders.