The first and only heavy pipe with a rubber intermediate layer

Understanding the dynamics of noise transmission in a drainage system is the first and most important factor in understanding why the POLO-KAL 3S soundproofed drainage system has been so successful. The vertical flow of effluent in the drainage stacks in a building is responsible for the most significant noise disturbance inside the building itself. If not assessed and planned correctly, the points where drain pipes pass through walls and floors will cause substantial problems by transmitting noise between different rooms in a building or, worse still (from a legal point of view), between different residential units. The POLO-KAL 3S drainage system was designed and first manufactured in the late 1980s, and was the first system to apply the “mass/spring/mass” principle, giving the pipe extraordinary acoustic absorption properties. 

Mass and elasticity combined to offer superlative soundproofing power

The POLO-KAL 3S system consists of external and internal layers in polypropylene mixed with mineral fibres, and an intermediate layer in the rubbery material Porolen, which acts as an elastic cushion. The “mass/spring/mass” principle combined with the three different thicknesses of the layers constituting the wall of the POLO-KAL 3S pipe allows the system to act as a genuine barrier against noise transmission. Certified compliant with European standards, the POLO-KAL 3S system offers a range of diameters from 75 to 160 mm (compatible with other commercially available drainage systems), while joints with elastomer gaskets ensure rapid and secure installation. In addition to a comprehensive choice of fittings and special shapes, the POLO-KAL 3S system also includes a range of exclusive accessories such as the POLO-CLIP HS soundproofed fastener collars and inspection pipes for cleaning, with a hermetically sealed access cover and offering three times more access space than any other inspection fitting.

Take a closer look at what acoustic performance figures actually mean

Over the past decade, a growing interest in acoustic insulation in building, combined with a more comprehensive knowledge of technical matters among professionals in the sector, have made comparing the lab measured performance results of different materials an increasingly complex issue subject to ardent differences in opinion. The is because, taking water drainage systems as an example, there are often enormous differences in the decibel values published in the technical catalogues of manufacturers, and in the majority of these cases, it is impossible to understand the technical reasons behind these differences (or, rather, the reasons are not clearly explained). Above all, when reading acoustic performance figures measured in the laboratory, it is extremely important that the installation method used for the test is also taken into consideration. Moreover, the documents and certificates presented by the manufacturer of drainage systems must specify the type of noise level measurement, in decibels, used for the test (Lin or Lsca), as there can be significant differences, for instance, if the pipe fastener collars are unfastened (fitted loosely), while some test methods actually subtract the noise component attributable to the air, and only consider the influence of the acoustic bridge produced by the fastener collars (as in the case of the measurement Lsca).