Modern Building Services

FEATURE PIPED SERVICES MODERN BUILDING SERVICES FEBRUARY 2021 25 Changing material trends When it comes to hot and cold potablewater supply systems, copper and flexible plastics have both proved their worth over the years. Copper has been used extensively since the 1940s (and particularly since the 1969 ban on lead piping) thanks to a number of benefits including inherent strength and stability, resistance to the effects of heat and pressure, not tomention hygiene properties. Plastic piping came to the fore in the 1980s and 1990s, providing an inexpensive alternative tometal pipework systems which is flexible, easy to install and not impacted by freezing temperatures. Both remain popular, but there is a third option which is becoming increasingly viable, combining the benefits of both in delivering a strong yet flexible solution; multi- layer composite piping. Conscious of the need tomake the right choice first time and driven by key factors such as cost, reliability and ease of installation, project teams are increasingly turning to this adaptable all-rounder –which is suitable for hot and cold potablewater systems, as well as a host of other applications. Strong and flexible Multi-layer pipework is not a new solution. In fact, the first multi-layer composite pipes were introduced to the UK market over 40 years ago, but it has often been reserved for industrial applications. Now, with greater discussion over materials selection and increased awareness of the benefits, it is proving the be an effective all-rounder which can overcome many challenges faced by project teams in the current climate. The product typically consists of three main layers, including a non- reactive, fire retardant outer plastic layer usually made of polyethylene (PE-RT II), which protects against corrosion and mechanical damage. This encases a central aluminium layer up to 0.7mm thick, ensuring that the pipe can be bent into position and remain in shape, which in turn encases a final plastic layer, usually made from the same or similar material to the outside layer. Multi-layer piping is corrosion- resistant, hygienic and is not liable to oxygen diffusion through the pipe wall, which minimises the risk of damage by oxygen corrosion elsewhere in the system. It offers reduced thermal expansion, is a poor heat conductor and has low intrinsic scrap value too, reducing the risk of theft from site which remains a concern for many in the industry. Crucially, it delivers a systemwhich is stronger and more durable than plastic piping, yet lighter and more flexible than metal options. It is a winning combination that can not only ensure a more efficient installation, but overcomes many of the specification challenges that could lead to costly errors or faults later down the line. Educating the industry At Geberit, our campaigns always seek to identify the challenges and highlight benefits for the industry, educating the whole supply chain and decision makers on alternative choices which can make a real difference to the success of a construction project. Our latest white paper, ‘Multi- Layer Pipework – The Perfect All-Rounder’, looks in detail at the challenges faced during the material specification process and digs deeper into the benefits of multi-layer pipework. To download a copy of the white paper, visit www.geberit.co.uk/mepla