
Kiwa Watermark Certification and Testing for Plastics Piping Systems Inside Buildings
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Who is Kiwa Watermark certification and testing for?
Certification and testing for plastics piping systems inside buildings is relevant for installers/ plumbers, architects, contractors, and anyone working for municipalities and housing association responsible for drinking water quality.
About Kiwa Watermark product certification and testing
Kiwa Watermark quality mark certified plastics piping systems inside buildings guarantee compliance with the requirements of Dutch and international standards for products used for drinking water distribution. In addition, the products meet the hygienic requirements, as set by the Dutch government. Only products that meet all requirements - including an agreed constant quality level - can be certified by Kiwa with the Kiwa Watermark. The guaranteed lifetime of the Kiwa Watermark certified pipes and fittings used inside buildings for transport of drinking water is at least 50 years.
Kiwa Watermark certification evaluation guidelines
Plastics piping systems of PVC-C for hot and cold drinking water (BRL-K536 A)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-A applies to products intended to be applied in piping systems for hot and cold-water distribution at a design pressure (= maximum operating pressure) of 8 or 10 bar (9 or 11 bar absolute or 8 or 10 bar overpressure).
The evaluation guideline BRL K536-A is a certification scheme for the Kiwa (technical approval-with) product certificate for plastics piping systems of PVC-C (type 1) intended for transport of hot and cold drinking water.
Plastic piping systems of PP-R for hot and cold drinking water (BRL-K536 B)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-B applies to products intended to be applied in piping systems for hot and cold-water distribution at a design pressure (= maximum operating pressure) of 8 or 10 bar (9 or 11 bar absolute or 8 or 10 bar overpressure).
The evaluation guideline BRL K536-B is a certification scheme for the Kiwa (technical approval-with-) product certificate for plastics piping systems of PP-R intended for transport of hot and cold drinking water.
Plastic Piping Systems of PB for hot and cold drinking water (BRL-K536 C)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-C applies to piping systems distribution systems for hot and cold drinking water at a design (working) overpressure of 8 or 10 bar.
The evaluation guideline BRL K536-C is a certification scheme for the Kiwa (technical approval-with) product certificate for plastics piping systems of PB intended for transport of hot and cold drinking water.
Plastic piping systems of PE-X for hot and cold drinking water (BRL-K536 D)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-D applies to products intended to be applied in piping systems distribution systems for hot and cold drinking water at a design (working) over-pressure of 8 or 10 bar.
The evaluation guideline BRL K536-D is a certification scheme for the Kiwa (technical approval-with) product certificate for plastics piping systems of PE-X intended for transport of hot and cold drinking water.
Plastic piping systems of PE-X/Al for hot and cold drinking water (BRL-K536 E)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-E applies to products intended to be applied in piping systems for hot and cold-water distribution at a design pressure (= maximum operating pressure) of 8 or 10 bar (9 or 11 bar absolute or 8 or 10 bar overpressure).
The evaluation guideline BRL K536-E is a certification scheme for the Kiwa (technical approval-with) product certificate for plastics piping systems of PE-X /Al intended for transport of hot and cold drinking water.
Plastic piping systems of PP-R/Al for hot and cold drinking water (BRL-K536 F)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-F applies to products intended to be applied in piping systems for hot and cold water distribution at a design pressure (= maximum operating pressure) of 8 or 10 bar (9 or 11 bar absolute or 8 or 10 bar over pressure.
The evaluation guideline BRL K536-F is a certification scheme for the Kiwa (technical approval-with-)product certificate for plastics piping systems of PP-R /Al intended for transport of hot and cold drinking water.
Plastic piping systems of PE-RT/Al for hot and cold drinking water (BRL-K536 G)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-G applies to products in piping systems for hot and cold-water distribution at a design pressure (= maximum operating pressure) of 8 or 10 bar (9 or 11 bar absolute or 8 or 10 bar over pressure.
The evaluation guideline BRL K536-G is a certification scheme for the Kiwa (technical approval-with-) product certificate for plastics piping systems of PE-RT /Al intended for transport of hot and cold drinking water.
Plastic piping systems of PE-RT Type II for hot and cold drinking water (BRL K536 H)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-H applies to products are intended to be applied in piping systems for hot and cold-water distribution at a design pressure (= maximum operating pressure) of 8 or 10 bar (9 or 11 bar absolute or 8 or 10 bar over pressure.
The evaluation guideline BRL K536-H is a certification scheme for the Kiwa (technical approval-with-) product certificate for plastics piping systems of PE-RT Type II intended for transport of hot and cold drinking water.
Multilayer piping systems PE-X/Al, PE-RT/Al, PP-R/Al and PP-RCT/Al for drinking water (BRL-K536 K)
Kiwa Watermark certification under Kiwa evaluation guideline BRL K536-K applies to products belonging to multilayer piping systems of PE-X/Al, PE-RT/Al, PP-R/Al and PP-RCT/Al which is intended to be used for hot and cold drinking water installation inside building at a design pressure of 8 or 10 bar (maximum operating pressure).
The evaluation guideline BRL K536-K is a certification scheme for the Kiwa Technical approval with product certificate for multilayer piping systems PE-X/Al, PE-RT/Al, PP-R/Al and PP-RCT/AI, intended for transport of hot and cold drinking water inside buildings.
Download BRL K536-K Evaluation Guideline
Inside building similar certification evaluation guidelines has been developed with DVGW, for more see:
General Rules for Product Certification
Product Evaluation Guideline
Contact our certification experts in this area to study your question and work with you to find the right solution to obtain the Kiwa Watermark quality mark.
Kiwa Watermark certification process
Find certified companies and organizations
Search company name, city, standard, BRL and/or certificate number with this finder on the Kiwa Netherlands website.
Kiwa Watermark Certification, Testing and Inspection
Tests and Kiwa Watermark certification guarantee compliance with the requirements of Dutch standards for products in contact with drinking water used in industrial and domestic drinking water installations.

Performance Testing for Plastics, Multilayer- and GRP (Glass reinforced Plastics) Piping Systems
Physical, mechanical, chemical, leak tightness and hydrostatic pressure testing on all types of plastic piping systems to have certification requirements validated and demonstrate compliance to national and international product standards.

DVGW Testing and Inspection
Testing and inspection for water and gas materials, components and products in accordance with various German DVGW evaluation guidelines to promote safety, hygiene and innovation – for the benefit of the environment and consumers.

Kiwa Watermark Certification and Testing for Plastics Piping Systems Outside Buildings
Plastics piping systems for the transport of cold drinking water outside buildings can be certified with Kiwa Watermark to ensure quality. Kiwa quality statements under Kiwa evaluation guidelines BRL- K506, BRL- K522, BRL- K17101, BRL- K17102, BRL- K17104, BRL-K17105, BRL- K17201, BRL- K17202, BRL- K17301, BRL- K17401 and BRL- K17605.

KOMO Certification and Testing for Plastics Piping Systems Inside Buildings for Heating Systems
Plastics piping systems inside buildings for heating systems can be certified with the KOMO quality mark. KOMO quality statements under Kiwa evaluation guidelines BRL- 5602, BRL- 5603, BRL- 5604, BRL- 5605, BRL- 5606, BRL- 5607, BRL- 5610, BRL- 5611, BRL- 5612, BRL- K17701.

Additional information
About Kiwa Watermark by Kiwa
Kiwa's unique position benefits in obtaining and continuing the Kiwa quality mark for your products. Learn how.