FRANK puddle flanges. The original.

In the early 1980s, FRANK developed and patented the FRANK puddle flange, a sealing system in use today in millions of buildings and structures all over the world. The original.

Mauerkragen das Original

The FRANK puddle flanges, suitable for all standard pipes in steel, plastic, stoneware, concrete and cast iron from d 20 to d 3200, have been specifically designed for the pressure-tight installation of pipelines in concrete walls, foundation plates and manholes. FRANK puddle flanges are
pressure-tight up to 10 bar, preventing the ingress of pressurised water, diffusing media such as gases (e.g. radon) and hydrocarbons (e.g. oil, petrol). The FRANK puddle flange is an extremely flexible
product available in a range of versions. A perfect solution for any application! Easy to install. Cost-effective alternative to conventional sealing systems.

Mauerkragen Schema

FRANK puddle flanges: Protection against radioactive gas

Radon-resistant, gas-tight puddle flanges from FRANK

Radon is a naturally occurring radioactive gas and comes from the natural radioactive decay of uranium and thorium. These metals occur naturally in bedrock and the release of radon therefore depends on
the local geology. You cannot see, smell or taste radon. The gas diffuses through the soil and is released into the atmosphere where it is found in very small concentrations. Outside of buildings, radon is therefore not a problem. The gas can however enter buildings, for example through cracks and joints, defective foundation plates in the basement or the ground floor, or along cable and pipe ducts. In this case, the radon concentration builds up gradually, often exceeding the limit values recommended by the German Federal Office for Radiation Protection. Tight foundations, solid constructions and special ventilation measures help keep the radon concentration in buildings low. When installing pipes and cable ducts through building walls, we therefore recommend using the special orange FRANK puddle flanges which are tested for radon-tightness.

Mauerkragen Skizze
Mauerkragen radondicht

Pressure-tight up to 10 bar!

Safe and versatile

Externally tested and certified

The independent material testing institute MFPA Leipzig GmbH checked the FRANK puddle flange for
its sealing effect and, with professional installation with at least 50 mm coverage in waterproof concrete, confirmed - depending on diameter and design - a sealing effect of 5 bar to 10 bar.

Characteristics FRANK puddle flanges made in EPDM

EPDM is chemically resistant to a wide range of acids and bases. It also offers outstanding weather and ozone resistance. For applications in connection with oil and petrol, FRANK puddle flanges made in NBR are the preferred option.

Mauerkragen Dichtheitsprüfung

Choosing the right pipe:
FRANK products for all applications

The FRANK puddle flange can be installed on any type of pipe material, from plastic, steel and stoneware to concrete, cast iron, fibre cement or GFRP. The FRANK puddle flanges are available for all conventional
outside diameters.

Mauerkragen auf verschiedenen Rohren

Successfully installed 1.5 million times throughout the world

Examples of applications - FRANK puddle flange

Anwendung Mauerkragen
Anwendungen Mauerkragen

Puddle flange installation

Easy and fast

Installation in just a few steps

  • put the FRANK puddle flange onto pipe
  • fix the puddle flange on the pipe with the clamping band
  • position the pipe with puddle flange to the intended position in the wall or floor slab
  • grout with waterproof concrete

FRANK puddle flange with Easy-Lock-Function


The FRANK puddle flange set (d 20 to d 500) is supplied with the new Easy-Lock function. With this technology, the puddle flange can be clamped multiple faster onto the pipe.

Mauerkragen Easy-Lock-Funktion

FRANK puddle flange - delivery program

d 20 - d 500 mm

Mauerkragen Set

> d 560 mm

Mauerkragen ab d 560mm

FRANK manhole connection SAM type 1

FRANK Schachtanschlussmuffe

FRANK Wanddurchführung mit Flanschanschluss und Mauerkragen für Blitzschutz

FRANK Wanddurchführung mit Flanschanschluss und Mauerkragen für Blitzschutz

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