[HALF-DAY - 3 CPD] Half-Day Seminar: Safe Water Traps in High Rise Buildings.
CPD/PDP Hours: 3
Ref. No.: IEM19/PG/202/S
Half-Day Seminar: Safe Water Traps in High Rise Buildings.
Date : 25 June 2019 (Tues)
Time : 2.00pm – 4.30pm
Venue: IEM Penang Secretariat
Moderator: Cheah Sheng Hong
Plumbing regulations call for a safe, usable and reliable drainage system. One of the primary functions of
a well-designed drainage system is the minimum loss of trap water seal to protect sewer gasses from
spreading smell and pathogens.
Water seals are breached by air pressures arriving in the system by water and air movement. These
pressures communicate an increase or decrease in the air flow and a typical drainage system provides
atmospheric air into the drainage system via a separate smaller vent pipe through the roof.
Pressure control via atmospheric air has been standardised in building codes which were made in the
1960s based on tests in 10 floor buildings, however since that time buildings have become much higher
and building drainage systems are starting to fail with empty traps.
Scientific studies by the Heriot Watt University (1984 – 2009) shows that the long time it takes for
pressures to communicate to the top of the building central to the (mal) functioning of the drainage
system. The best way to control pressures and maintain a water seal is to provide pressure relief as close
to the source as possible. The practical and most economical solution is to use a single stack drainage
system with Studor Active Drainage Ventilation. This system attenuates any pressure difference
immediately at the Point of Need and has been used since 2003 in many high-rise buildings world-wide
and has been adopted in the Australian building code.
In this seminar you will learn more how over- and under pressures are influenced by slow down flow, roof
top wind, sewage condition, induced siphonage and reflections of the wet stack. Furthermore, you will
learn that an active ventilation system can offers guaranteed protection of any trap in the drainage system
for any building and a reduction of cost and installation time.
About the Speaker:
Mr. Erik Douma
Business Development Manager High Rise (Asia & Pacific) - Aliaxis Group
Located: The Netherlands
Nationality: The Netherlands
Mr. Erik Douma graduated first in 1986 at the University of applied sciences in The Hague
in The Netherlands. He holds bachelor degrees in education, commerce and management. Additionally he
has studied Thermo Plastics at the TIO, University of Applied Sciences in Utrecht and Transient pressures at
the Heriot-Watt University, Edinburgh.
Erik started in the plastic industry in 1997 and has been active within Aliaxis in various roles with
thermoplastic pipe systems for building, industrial and utility applications. He has been technically and
commercially active in Europe, Asia, Pacific, Middle East and Africa. Last 7 years he has focused on HDPE,
noise attenuating- and siphonic roof drainage systems for Europe, Asia & Pacific.
His experience has evolved in 2018 to a responsibility for the business development of high rise solutions
within the Aliaxis group for Asia and the Pacific region. He is in close contact with Aliaxis companies world
wide concerning engineering and product management.
Nowadays, Erik assists project developers, consultants and installers with technical options in high rise
projects specially for drainage systems.
2.00pm -2.30pm Registration
2.30pm – 3.15pm Session 1
3.15pm – 3.30pm Tea Break
3.30pm – 4.15pm Session 2
4.15pm -4.30pm Q & A / End