Changes in Evaluation Guidelines or BRLs 2026

BRL‑K775 published for comments

As of 17 April 2026, the newly developed BRL-K775 has been published for public comment. BRL-K775 specifies the requirements for a product certificate for ductile iron couplings and flange adaptors with wide tolerance for use with pipes of various materials: ductile iron, grey cast iron, steel, PVC U, PVC O, PE and fibre cement, intended for contact with drinking water.

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BRL K536-L declared binding

Kiwa has declared the assessment guideline BRL K536-L binding as of 27 February 2026. This guideline defines the requirements for multilayer plastic piping systems with a metal inner layer for the transport of hot and cold drinking water within buildings.

BRL 5613 declared binding

Kiwa has declared the assessment guideline BRL 5613 binding as of16 March 2026. This guideline describes the requirements that plastic piping systems with a metal inner layer must meet for radiator connections in heating installations within buildings, in the context of certification with the KOMO quality mark.

Draft BRL-K778 published for comments

A revision of BRL-K778 cement mortar lining of drinking water pipes and fittings) has been prepared and is published for public consultation.

New BRL K17504/04 binding as of 14 January 2026

As of 14 January 2026, the revised evaluation guideline BRL K17504/04 for vulcanised rubber products for cold and hot drinking water has been officially declared binding.

Evaluation guideline changes

An evaluation guideline or ‘Beoordelingsrichtlijn’ (BRL) is a package of requirements that a product or service can meet to demonstrate a certain guarantee of quality and legality. Kiwa offers BRLs in various subject areas. The requirements in a BRL are drawn up by an independent Board of Experts. A product or service is assessed by Kiwa on the basis of those requirements. When we introduce a new BRL or when a BRL changes, we will publish these BRL's.

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