National drainage and wastewater specialist Lanes Group plc is promising to transform the rehabilitation of vertical drainage stacks with a revolutionary LED pipe lining system.
The company has proven it can significantly speed up the previously difficult process of lining both rainwater and foul stack pipes, with less disruption, using far less energy and creating less material waste.
Laneshas become the first contractor in the UK to line tall building drain stacks using the BrawoMagnavityLED light cured in place pipe (CIPP) system supplied by trenchless technology specialist S1E.
It has lined six 47-metre cast iron rainwater stacks at a 12-storey block of flats in Birmingham, with five more blocks in the pipeline – and says the technology can be used to rehabilitate rainwater and foul stacks in office and factory buildings as well.
Mark Scott, Manager of the Lanes Birmingham depot,which is leading the company’s investment in the BrawoMagnavity technology, pictured,said: “We were able to install and cure each liner in just two hours, which is far quicker than is possible with conventional lining technology.
“This level of performance makes the technology a realgame-changer. It means stacks can be lined much more quickly, more sustainably, and to a consistently high quality standard.
“Property owners can now be confident, for the first time, that a significant maintenance headache can be resolved with a cost-effective,planned repair programme.”
Faulty rain and foulwater stacks are a prime cause of damp, mould and substrate damage in a wide range of high-rise residential, commercial and industrial buildings, which can trigger serious health problems for occupants and require costly repairs.
The BrawoMagnavityNano LED CIPP system provides a long-term cure for these problems by installing tough and waterproof liners insidedefective pipes, giving them a new design life of up to 50 years.
It can be used to line both vertical and horizontal pipes with internal diameters from 70mm to 250mm.Liners up to 50 metres long can be installed, including being ‘blind shot’ into a pipe from a single chamber. This means pipes runs of up to 100 metres can be lined between chambers.
A key innovation is the way the system’s LED light head is sent along the pipe, held in place by a powerful electric magnet, at the same time as the liner is inverted into it with compressed air.
The magnet is then switched off, allowing the LED light head, with its 96 individual lights, to be pulled back through the pipe while curing resin at a rate of up to 0.6 meters a minute.
Because the magnet guides the liner so effectively through the pipe, it can negotiate multiple bends of up to 90 degrees, something other CIPP lining systems fail or struggle to achieve.
The specialist 3D liners selected by Lanes for the high-rise stacks are flexible so accommodate the 70mm to 100mm changes in diameter in the pipes being lined.
The advanced odourless resin developed by Brawo is stable until exposed to LED light, giving the Lanes lining team all the time it needs to prepare the liner for curing. By contrast, ambient cure liners must be inserted in a specified time before the resin starts to harden.
Mark Scott said: “We can now line vertical stacks to a deadline and standard that would be impossible with hot water CIPP due to the weight of the water in the liner, and would be risky with ambient cure CIPP because of the unpredictability of curing times, and the production of toxic vapours.”
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