Construction products detail

Connectors for drains

Connectors (clamp connectors and/or couplings) for drains are designed to connect pipework parts such as pipes and fittings permanently such that no waste water can escape from the joints. In the case of connectors for underground drains, it must also be ensured that no groundwater can penetrate into the drain through the joints.

Connectors usually consist of a base element made of materials such as steel or plastic and elastomeric seals.

Regulatory framework

Connectors covered by the relevant harmonised standards, e.g. DIN EN 295-4 or DIN EN 877, do not require additional regulatory verification of fitness for use.

For connectors that are not covered by a harmonised standard or a European Technical Assessment, DIBt grants national technical approvals (abZ), also in combination with a general construction technique permit (aBG) for the application.

European Technical Assessments (ETAs) can also be issued for corresponding products. For connectors that are covered by a European Technical Assessment, a general construction technique permit for the application may be pertinent.

This includes in particular verifications for clamp connection systems that connect drainage pipe components made of different materials when one component is not covered by a harmonised standard.

Please also note the relevant provisions of the federal states following MVV TB, Section B 2.2.6 'Property drainage systems'.

For the assessment of the above-mentioned construction products and techniques within the framework of the national procedures, DIBt prepares application-specific test plans. DIBt approval principles and preliminary test programmes form the basis for this. These are compilations helping to speed up the procedure.

The approval principles and test programmes in this work area are not published, but are made available to the applicants during the procedure. To date, the following compilations are available:

Approval principles for clamp connection systems with elastomeric seals for socketless drainage pipes and fittings (Zulassungsgrundsätze für Spannverbindungssysteme mit Elastomerdichtungen für muffenlose Abwasserrohre und Formstücke)

docx-Datei Material data sheet (2 pages ) Version: January 2020; Word pdf-Datei Material data sheet (2 pages ) Version: January 2020; PDF pdf-Datei Guideline: How to provide drawings for national technical approvals and general construction technique permits (5 pages ) Version: July 2017

National procedure

A national technical approval (abZ) and/or oder general construction technique permit (aBG) is granted upon application (see Model Building Code (MBO), Sections 16a(2) and18(2) and (4)). This also applies to amendments and supplements to, or renewals of existing approvals and/or construction technique permits.

No formal requirements apply. The following information is needed: name and address of the applicant, description of the product and/or construction technique and its field of use or application, type of decision required (new decision, amendment or supplement to, or renewal of, an existing decision).

Please feel free to use the template below.

European Technical Assessment (ETA)

To start the ETA procedure, please submit the form below. We will then check if the prerequisites for issuing an ETA are met, i.e., in particular, if the product is not fully covered by an existing harmonised standard. If the prerequisites are met, we will check whether a European Assessment Document (EAD) covering the requested assessment scope already exists or still needs to be developed. If an EAD needs to be developed or amended, a complete technical file needs to be established before the procedure can begin.