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  • Certified Management System

    • Management Systems


    • Certificate Holder

      Bauunternehmen Siegfried Sommer Inh.: Dietrich Sommer

    • Test Mark Number


    The certificate holder's Management System corresponds to standards:

    1. Qualified Pipeline Construction Company DVGW-GW 301

    2. Qualified Pipeline Construction Company DVGW - GW 302

    Certificate scopes

    • DVGW

      DVGW GW 301:

      Group W3: pe
      Water pipelines for operating pressures ≤ 16 bar and nominal diameters ≤ DN 300, made of: PE

    Certificates for this Management System

    Contact to the certificate holder

    Bauunternehmen Siegfried Sommer
    Inh.: Dietrich Sommer
    Im Höfchen 7
    35685 Dillenburg