TPi October 2012

plast ic pipes

The rise of plastic As part of a debate that has been raging since the 1970s, there has been a constant comparison between traditional copper pipe systems and the more modern plastic varieties available in the market.

while installing copper pipes can have detrimental effects on a plumber’s health: the fumes are dangerous when inhaled and proper safety equipment includes gloves and breathing apparatus. Plastic eliminates this risk of chemical exposure and the requirement for additional protection. It is lead-free, which adds to its non-toxic profile. Mr Sanger commented, “Electrocution hazards are also greatly reduced with plastic because unlike copper, plastic is a non-conductor.” One of the main worries whilst choosing a pipe system material is “How long is it going to last?” This is a valid concern, and one that plastic has overcome. Plastic push-fit systems have paved the way towards a corrosion-free, build-up-free and burst averse future for all installers. This means lower replacement rates and hardly any wear and tear during the system’s lifespan. Earlier misconceptions led installers to believe that plastic does not last. However, due to its smooth internal bore, limescale accumulation is minimised, while the inherent elasticity in plastic allows for thermal expansion. This leads to fewer fractures and a curbing of subsequent leakages.

all kinds of joists as opposed to only traditional solid ones and can easily be manipulated around obstacles. Newer push-fit systems, like Speedfit, have been engineered such that they are light and can fit more easily into smaller, more confined spaces like the inside of a home. This also allows for concealed plumbing. Copper pipe, however, does not afford the installer the convenience of reaching less accessible areas; it is not as malleable as plastic and requires notching of joists, which is not possible with new generational composite joists. Unlike pipe systems that use traditional materials, plastic pipe systems can be fitted into conduits enabling them to be easily withdrawn as well, keeping in line with building regulations. Rigid copper systems require continuous access. With respect to tools, plastic systems offer benefits. Nigel Sanger, technical manager at Speedfit, said, “The systems are truly demountable, which reduces the need for tools and completely eliminates the need for chemicals and blowtorches.” This effectively removes the risk of chemical hazards and fires. When it comes to systems set up, the installer’s health and safety is of primary importance. The use of flux

Earlier, plastic played the role of the under-dog: overlooked by the average plumber as being a cheap substance that doesn’t last very long, a substance unworthy of being considered a high- grade pipe and fittings material. However, superior engineering and advancements in plastic push-fit have since made their mark on the pipe systems world. This article seeks to redress that problem by answering a number of oft-attempted questions: which system offers more benefits; which one is more profitable in the long run; which one is easier to use? In short: which one is better? Are plastic pipe systems really the future, or do traditional copper systems still fit the bill better? To begin the evaluation, a topic that is foremost on peoples’ mind post- recession is ‘costs’. A comparison of straight lengths of both copper and plastic tubing yielded surprising results: the recent rise in metal prices has led to an explosion in metal fitting and pipe costs with 15mm diameter copper tubing priced at £2.53 per metre. In comparison, a length of plastic pipe of the same dimensions costs £1.41 per metre. The installation process (and its ease) is the next subject under scrutiny: how simple and flexible are the pipes and fittings to use and how quickly and effortlessly can they be installed to form a complete and efficient system? Time is money, and time savings are money savings. Plastic push-fit systems have been proven to reduce installation time by up to 40 per cent compared to copper. Quicker connections mean faster installations. This observation is fast removing the misconceptions previously associated with plastic systems. Copper, which was the material of choice in the past, is now almost obsolete in new build houses, except for gas lines. The reason for this is simple: contemporary plastic pipes allow for more flexibility in use. They can be threaded through

John Guest Ltd – UK www.johnguest.com Production of plastic extruded tubing

Russell Plastics’ extensive range of both standard and specialist tubes is ever increasing. Of special interest is the company’s ability to produce ‘micro bore’ tubes. Tube profiles with more than one lumen are regularly produced – down to 0.65mm inside diameter. Raw materials processed range from silicone rubber to water soluble specialist polymers. The more ‘normal’ hard polymers are processed into tube products. The range of existing sizes is from 0.65 to 126mm, though not in all materials. Different wall thicknesses are possible, which can increase or decrease the pressure the tube can take. The products are supplied either as coils or cut to required lengths during manufacture.

Russell Plastics – UK sales@russellplastics.co.uk www.russellplastics.co.uk

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October 2012 Tube Products International