PROJECT 27
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shower room and basin situated on each floor . Basins in the common area do not have a hot water supply at all .
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High density polyethylene ( HDPE ) was utilised for all internal drainage and water supplies as HDPE is a greener option . Not only is it environmentally friendly , but it also provides the durability and longevity needed for the job .
All waste and sewerage lines were installed with HDPE from Geberit . All pipes are butt welded or connected with electricfusion couplings . Galvanised pipes were installed for all main cold-water lines and rises in ducts . Copper was installed in walls and branches in ducts .
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The rainwater disposal system was designed by Geberit , making use of the Pluvia system . The reason behind this was because all lines that are vertical run level and can be cast in roof slab with outlets .
There is also a cold-water connection on the roof that feeds the aircon chillers on the roof . This is for make-up water from the chilled water system . If a leak occurs in this system , this assists in keeping the pressure of the water at operating pressure . The pressure reducing valve is set to chilled water operating pressure and is linked to the BMS system . An alarm will sound if there is a leak .
All water points to floors and areas are metered as this is a multitenanted building . PA
1 . HDPE piping . 2 . One of two 200l water tanks . 3 . Paraplegic toilet . 4 . Booster pumps . 5 . Hot water supply with heat pumps .
February 2024 Volume 29 I Number 12 www . plumbingafrica . co . za