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BI Adapter

System for connecting pipes with a non-circular outer geometry

The Funke BI-Adapter® is a system for connecting pipes from DN 150 to DN 1000 which are circular on the inside, but have a non-circular outer geometry such as a base or a reinforcement crown, or where excavation to expose the outer surface of the pipe is risky or difficult. It also allows you to connect ovoid pipes with circular pipes. The Funke BI-Adapter® consists of an inner sleeve, an expansion wedge made of 1.4404 stainless steel and an EPDM sealing collar.

Fast, flexible and sealed

The EPDM-covered stainless steel barrel is inserted into the pipe. The user then widens it by driving in the wedge, which press fits it onto the inner wall of the pipe. Several sealing ribs arranged in a ring shape ensure that a tight joint is formed. The VPC® Pipe Coupling included in the delivery is then mounted and fastened on the other end of the BI-Adapter. This makes it possible to connect a pipe with a circular outer geometry. The outer diameter of the pipe to be connected must be in the clamping range of the VPC® Pipe Coupling being used. The Funke BI-Adapter® is available for pipes with nominal diameters from DN 150 to DN 1000.

The advantages in practice:

  • suitable for all conventional pipe materials
  • easy assembly
  • flexible use in combination with VPC® Pipe Coupling
  • designed to connect pipes that have non-circular outer geometries
  • the method of connecting pipes has been approved for the nominal diameters of DN 150 up to DN 600 by the German Institute for Structural Engineering (DIBt) and was assigned approval number Z-42.5-546

Technical Data

Product name: Funke BI-Adapter®
Material: Stainless steel 1.4401

EPDM seal

Colour: Silver-grey / black
Nominal diameters: DN 150 up to DN 1000
Installation guideline: According to the manufacturer’s instructions
Area of use: It allows the connection of pipes that are made of different materials with an internal circular geometry and with a different circular outer geometry (different pipe constructions). For example: corrugated pipes, cast iron pipes, ribbed pipes, concrete pipes, concrete pipes with foot (base).
Installation conditions: According to the manufacturer’s specifications
Scope of delivery:
  • BI-Adapter®
  • VPC® Pipe Coupling
  • Tapping block
  • Special lubricant for the Funke BI-Adapter® including brush
  • Installation instructions
Special characteristics:
  • Easy assembly
  • Suitable for all conventional pipe materials
  • Flexible use in combination with VPC® Pipe Coupling
  • Designed to connect pipes that have non-circular outer geometries
  • Delivered in a carton




BI Adapter Brochure

BI Adapter Installation Instructions

For more information or to purchase this product, please contact our Sales Office on 01722 717708 or our Technical Sales Manager, Dave Williams:

 07392 080611

 01722 717708