Plumbing Africa August 2017 | Page 35

project 33 Hot water is supplied to the kitchenettes on the first and second floors, the shower WC on the ground floor, and the main roof kitchen only. No hot water is provided within the male and female toilet blocks. This minimises hot water consumption, reducing the amount of energy needed to heat domestic water. Hot water is pre-heated within a rooftop solar system and stored within an insulated 600kPA geyser located within the plumbing riser. Potable water consumption is further reduced through the on-site treatment of effluent. Treated water is then reused within the building to flush toilets and irrigate the roof garden. Following the collection and storage of effluent in three inter-connected septic tanks, the Lilliput plant then treats the water in a four-stage anaerobic process, improving water quality to a level suitable for discharge into a stormwater or river system. Consumptive use of non-potable water through use as irrigation water is supplemented by a 10 000ℓ rainwater harvesting system. Rainwater is collected from both the upper and lower roofs channelled to the basement, filtered, and then reused by pumping back up to the rooftop holding tank. List of professionals Owner Developer Architect / Designer Project manager Consulting engineers       Electrical Mechanical Wet services Fire Structural and civil Sustainable building Quantity surveyors   Contractors Product suppliers     Main building HVAC & R Gas heaters BMS and CO censors Axial fans Basement extraction fans Server room mid-wall split Ducting About the WWF The WWF is one of the world’s largest and most respected independent conservation organisations, with almost six million supporters and a global network active in over 100 countries. WWF South Africa (WWF-SA) is a www.plumbingafrica.co.za Smart metering has been installed throughout the building and connected to the building monitoring system. The automated drip irrigation system delivers optimal quantities of water to the indigenous plants within the rooftop flower boxes. The system includes a rain sensor to ensure overwatering does not occur, as well as minimise water consumption during rainy periods. Source: gbcsa.org.za WWF South Africa WWF South Africa Alive Architecture Bornman & Associates Onezero Consulting Bornman & Associates Solar Power Installations Building Code Consultants TG Harrison Bornman & Associates Russell Irons & Associates Giuricich Brothers Construction Kenred Air Rinnai Paloma gas heaters Greenwave Automation Air Movement Supplies Air Movement Supplies Samsung Metflex Industries national office that is part of the WWF network. They are a local NGO that, for more than 40 years, has worked towards the aim of inspiring all South Africans to live in harmony with nature, for the benefit of our country and the well-being of all our people. PA Consumptive use of non- potable water through use as irrigation water is supplemented by a 10 000ℓ rainwater harvesting system. August 2017 Volume 23 I Number 6