If you have not yet registered on the Valsir web site fill in the form with your details and obtain free access to the download area where you will be free to download our price lists and technical brochures. You will also have the possibility of receiving our periodic newsletter: the best way to remain up-to-date on all the latest developments in Valsir.

Forgotten your password?

Valsir S.p.a
Waste and water
supply systems, underfloor heating system
and flush cisterns


the new passive fire protection system


Valsir Collarwings is the new range of fire stop collars produced in compliance with the most recent standards and suitable for installation on plastic waste and drainage pipes. The Collarwings fire stop collars are made of steel and painted with polyester powder fitted with special intumescent inserts which, in the event of fire, expand and squeeze the pipe thus preventing the passage of flames, combustion gas and vapours and acting as a thermal insulation.

The collars can be installed either in a vertical wall or in the slab and they have a fire resistance class of EI240 in compliance with European Standard EN 1366-3.

Download the documentation

Reliable Protection

The resistance and insulation of at least 240 minutes (4 hours) are guaranteed by the presence of special metal elements (reinforcing flaps) that increase the effectiveness of the two types of intumescence which, when combined, provide high expansion reactivity and high mechanical resistance over time.

The latch mechanism and wide base plate with holes guarantee simple positioning and quick installation.


Resistance class EI240

Resistance class EI240 in compliance with standard EN 1366-3, the equivalent of a resistance to fire and combustion gas and a thermal insulation of at least 4 hours.

Flexible installation

Can be installed in a vertical wall and in the ceiling.

Wide range of diameters

Range of diameters from 32 mm up to 160 mm.


Can be used on ventilated and non ventilated waste pipes and on rainwater drainage pipes

Suitable for a wide range

Suitable for a wide range of pipes (PP, HDPE, ABS, SAN+PVC, PVC-C, PVC-U) and soundproof systems (Triplus®, Silere®).

Quick installation

Simple and quick installation thanks to the latch mechanisms and pre drilled base plate.

Simplified mounting

Can also be fitted to existing pipelines.

Tested in compliance with EN 1366-3

Tested in compliance with EN 1366-3 on a standard wall in cellular concrete (reports CSI1917FR and CSI1862FR) and in reinforced concrete slab (report CSI1915FR).

Operating principle

In the event of fire the intumescent material contained in the collar expands forming a “plug” thus cutting off the fire and preventing gas and fumes from spreading.

The special closure elements (reinforcing flaps) increase reactivity and efficiency of the system by completely squeezing the plastic pipe during the melting phase.

Phase 1

During the first phase of the fire the plastic pipe melts and the intumescent inserts expand. The first is more reactive and acts immediately, the second, which expands at a higher temperature results in a high performance over time.

Phase 2

During the next few minutes the intumescent elements of the collar occupy the entire section left free by the plastic pipe that is in the process of melting. The intumescent inserts expand and act on the closure elements (reinforcing flaps) bringing them to the position of exposure to the fire.

Phase 3

The intumescent inserts shut off the hole entirely in a sufficient period of time so that the fire does not spread to other areas. During this phase the closure elements (reinforcing flaps) are completely oriented and, as well as acting as a “container” for the expanded intumescent material, create another metal barrier against the fire.


Test results

The European standards EN 1363-1 and EN 1366-3 defines the standard test criteria applicable to fire collars and introduce requirements that must be met in order to ensure the proper functioning of the passive safety system.

Discover more about Collarwings test results


Valsir provides complete support both during the planning phase and on site, thanks to a first-class technical office made up of a team of highly experienced engineers, capable of dealing with the most complex system requirements.

Discover more