Drainage & Venting
  • Pressure Attenuators – seven years on 28 August 2012

    Pressure Attenuators, introduced by Studor to the market in 2003 and approved for use in Australia in 2005, have revolutionised multi-storey sanitary drainage in Australia. The uptake of the Pressure Attenuator – an alternative to relief venting – was ... Continue Reading

  • Drainline transport of waste 26 June 2012

    John Koeller, the principal of Koeller and Company offers a comparison between washdown and siphonic toilets. When you work with toilets as we do, and especially water-efficient toilets, you are bound to hear some statements over and over, especially these:... Continue Reading

  • Water supply and drainage for buildings 21 May 2012

    The International Symposium on Water Supply and Drainage for Buildings will this year be held in Edinburgh, Scotland. The Symposium will be hosted by the Drainage Research Group at Heriot-Watt University, and will run from 28 to 30 August, ... Continue Reading

  • Drainline poisoning 2 February 2012

    A drainline in Lahore has been found to be contaminating vegetable crops with heavy metal pollutants. Vegetables being sold in some of Lahore’s city’s markets have been obtained from agricultural farms being irrigated by untreated, toxic and polluted water ... Continue Reading

  • Dealing with drain contamination 2 February 2012

    A US study has found that plumbing systems may be a cause of human infection. Examining the prevalence of the fungus Fusarium in bathroom sink drains, researchers in Penn State’s College of Agricultural Sciences found that about 70 percent ... Continue Reading

  • Soils and the drainage system 7 July 2009

    Soils that move pose significant risk to drainage systems and the buildings they service. Angela Tufvesson investigates the dangers of reactive and dispersive soils. To ‘build on solid ground’ is something of an assumption. It presumes the stability and ... Continue Reading

  • New drainage system syphons water 13 February 2009

    Syfon Systems is finding success in Malaysia with its proprietary Syfonic downpipes featured in high-profile projects throughout the Asia Pacific region. Construction in the Asia Pacific tropics can create a plumbing nightmare for engineers due to monsoonal weather patterns. During the ... Continue Reading

  • Reductions in drainage stresses old plumbing systems 13 February 2009

    Downstream plumbing does not attract much interest until something goes wrong. Now with the emphasis on water conservation there are concerns that lower building drainage flows will mean future problems. The most common plumbing system design in the developed world ... Continue Reading

  • Siphonic roof drainage 9 February 2009

    It is well known how a siphonic system performs when fully primed, but few had questioned what happens under part load. For many years Geberit International has felt that the way forward has often been to examine ... Continue Reading