What each abbreviation means
| Abbreviation | Institution and country | What it covers |
|---|---|---|
| DVGW | Deutscher Verein des Gas- und Wasserfaches, Germany | certification of products for gas and water installations |
| KIWA | Kiwa, Netherlands | certification of products for water installations, including drinking water |
| WRAS | Water Regulations Advisory Scheme, United Kingdom | compliance with UK water fittings regulations (Water Supply (Water Fittings) Regulations 1999) |
| RISE | Research Institutes of Sweden, Sweden | testing and certification of products, including plumbing products |
| INiG | Oil and Gas Institute – National Research Institute, Poland | testing and certification of products for the gas industry |
| PZH | National Institute of Public Health PZH – National Research Institute, Poland | hygiene certificate: the product may come into contact with water intended for human consumption |
Alongside approvals, catalogues also cite a standard. EN 1254-7 is the European standard for fittings with press ends for metallic pipes, while EN 1254 as a whole covers fittings made of copper and copper alloys.
Which lines have which approvals
| Line | Approvals per catalogue |
|---|---|
| Besco Gutpress Copper, V profile · water | DVGW, KIWA, WRAS, RISE |
| Besco Gutpress Copper, M profile · water | DVGW, WRAS, RISE |
| Besco Gutpress Copper for gas, V and M | DVGW, INiG |
| Besco solder EN 1254 | DVGW, KIWA, WRAS |
| Besco Gutpress Ball Valves V and M | DVGW, WRAS |
| Tectite Sprint and Classic | WRAS, PZH |
| Tectite Pro and 316 | WRAS |
An approval may cover only some of the diameters or applications of a given line. The scope and validity are always confirmed by the certificate itself.
Which documents are needed in Poland
Foreign approvals are a strong quality argument: the product has been tested in a country with high requirements. On Polish building sites, however, customers most often ask about two documents:
- PZH hygiene certificate for drinking water installations.
- The declaration of performance (DoP), which the manufacturer issues for a construction product.
For gas installations, customers more often ask about the INiG certificate. Exactly what is required on a given project is determined by the design and the site inspector.
How to obtain the documents
We make certificates, declarations and approvals for the Besco and Pegler Yorkshire lines available to wholesalers in the document library after verification. If a customer asks about a specific item, include its number in your enquiry and we will find the right document.
Data source: Besco 2026 and Tectite 2026 catalogues. As of 2026.