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Plastic pipes dominating new build

Plastic pipes combine well with other materials

Plastic pipes combine well with other materials

Plastics are now the dominant material in hot and cold water supply systems inside buildings.

Data from Pipes and Fittings Market Report – UK 2016-2020 Analysis shows that use of plastic piping systems for water supply in new build is now up to 60%.

An upward trend is similarly being seen, and predicted to continue, for heating with the availability of barrier and multi-layer pipes for central heating and the energy efficiency benefits of warm water underfloor heating (UFH) in providing space heating at lower water temperatures.

While their flexibility, their quick and simple jointing and the added safety of no hot working have all driven this growth, with the large amount of pipework of different materials in existing buildings, it is definitely an advantage to be able to combine plastic with, for example, copper piping systems.

Bathrooms and kitchens are generally replaced due to lifestyle and design choices, and central heating boilers due to system efficiency and lifespan every ten–15 years. Plastic plumbing system manufacturers provide fittings that form reliable joints from plastic pipes to copper and other metallic pipes, which is a boon when refurbishing older properties. Over a property’s lifetime, the plumbing system can transition to plastic piping with the many in-service benefits of low thermal conductivity (safer to touch), low noise transmission (no creaking pipes), smooth bore (minimises limescale build-up), thermal expansion (reduced risk of bursts during frosts) and inherent corrosion resistance (cleaner heating system).

Well-engineered joint designs have made plastic piping very easy to work with and so, the material of choice for busy plumbers and larger-scale installers. Pipe coils can easily be cut to size, offering flexibility for even the most awkward applications – threading through joists, sitting beneath floors – and with a wide range of push-fit, press-fit and welded joints, ensure that connections are secure and leak-tight.

Gareth Samuel, of BPF Pipes Group, said: “As installer confidence grows, so do the number of applications in which we now routinely see plastic piping systems. The BPF Pipes Group guidance on the use of plastics for discharge pipework from unvented hot water systems sets out the range of materials which can safely be used for discharge pipes and soil stacks taking discharges.

“Underfloor heating systems provide an attractive alternative to radiators – the massive performance improvements offered by warm water UFH systems over electric systems and the dust-generating hot air systems means that this is a real option not only for commercial properties and luxury homes but also for housing developments and self-builders. All this has been made possible by the availability of well-designed and quality assured plastic pipes.”

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