In 1997 Valsir commenced a difficult undertaking in the research and verification of the acoustic insulation capacity of pipes destined for use in the waste systems of buildings.

The tests carried out in the Fraunhofer Institut fur Bauphysik in Stuttgart, recognised as being the best laboratory for acoustic tests, evaluated the sound absorption capacity of the products and determined whether they met the requirements of the laws and standards in force.

The testing campaign, the last tests of which were carried out in July 2006, achieved excellent results and allowed interesting comparisons to be carried out between the various product lines manufactured in the Valsir factories.