HEATING & PLUMBING


FLEXIBILITY TURNS THE KEY ON PIPING SUCCESS


Antony Corbett, Geberit product manager, talks to BMJ about multi-layer piping. C


ombining the advantages of plastic and metal piping systems, multi- layer piping solutions offer a flexible, single solution for a wide range of applications across all sectors. That’s according to Antony Corbett, product manager for Geberit.


“The use of bendable, press-fit plastic piping for supply pipes has been steadily increasing over the last ten to 15 years, as installers exploit the benefits of flexible piping not only for underfloor heating but also potable water and general heating too,” he says. “However, there is another solution which combines the strength and stability of metal piping systems with the flexibility and corrosion resistance of plastic - all with the added convenience of press-fit.” Corbett adds that bendable yet durable, multi-layer piping systems like Geberit Mepla consist of three layers; an outer plastic layer made of polyethylene (PE-RT of the second generation) which protects against corrosion and mechanical damage, a central aluminium layer which makes the pipe stable yet flexible, plus an inner layer, which is also made of PE- RT, for internal corrosion resistance. “This technology offers a single solution for all potable water and heating supplies on domestic and light commercial projects, not to mention industrial applications such as compressed air and cooling water systems. Here are five compelling reasons to promote multi-layer piping to customers,” he says.


Enhanced Strength Ultimately, multi-layer systems are about improving the strength and durability of the system when compared with plastic piping, without compromising on weight or portability as can be the case with metals. “The longitudinally-welded aluminium layer offers mechanical stability to ensure that the pipe remains in its required position yet remains flexible enough to bend. It also provides an oxygen barrier, making it suitable for use in central-heating systems and makes the pipe detectable by electronic devices after installation,” Corbett continues. “Thanks to the good bending capacity, multi-layer piping can be adjusted to suit the application, even manipulated to follow the line of curved architectural features in modern buildings. Pipes of 16mm and 20mm can be bent effortlessly by hand to reduce the number of fittings required, which saves


30


time and money during installation. Larger diameters up to 50mm can also be bent without risk of de-lamination or kinking using an appropriate tool.”


Even where fittings are required, Corbett says the option for press fitting enables quick, simple and reliable connections with no need for hot works. “This prevents additional mess on site, reduces health and safety considerations


and avoids delays to allow for cool down. The only tools needed to form a reliable, tight and durable connection are a cutter, deburrer and press tool.” He adds that the absence of a working flame can also reduce insurance premiums and minimises the risk of damage to existing fittings and fixtures and the surrounding areas.


Hygiene first


“There are a number of features which enhance the hygienic qualities of multi-layer piping,” Corbett continues. “Firstly, the polyethylene inner layer is resistant to cracking, ageing and general wear and tear, as well as being non-reactive and corrosion resistant, making it suitable for use in plumbing and potable-water applications.


“Then, the low internal surface roughness (7 µm) of the inner layer also means it is more difficult for limescale and biofilm to adhere to the smooth surface, providing resistance to scale build-up.


“It has excellent acoustic insulation properties, so water passing through the pipework produces much less noise than in metal piping. Fittings and pipes from leading manufacturers even come with protective caps for added hygienic safety when stored or during an installation break.”


Always reliable


These benefits would be irrelevant of course if the piping was not reliable, but Corbett says that, thanks to the products multi-layer piping, contractors and end users can have complete confidence in a permanently leak-proof


system. “With Geberit Mepla, there is a fail- safe method of checking for unpressed joints. Unpressed fittings are designed to leak slightly during pressure testing (even at low water testing pressure) and can be pressed without having to drain down the entire system,” he says.


Flexibility of application A solution for all applications, multi-layer piping is a great all-rounder to stock, Corbett believes. “It is a must for all contractors working on light commercial and industrial projects, leading manufacturers offer pipes in a broad range of diameters to enable crucial consistency across larger construction projects. “Multi-layer piping is versatile and economical – so it’s the perfect choice for applications outside of plumbing and potable water. From compressed air and vacuum systems, to cooling equipment and process water systems, multi-layer piping offers high margin opportunities for customers when working across a range of sectors including automotive, chemical, pharmaceutical and food processing.”


www.buildersmerchantsjournal.net November 2019


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