22 PROJECT
installation. Two vertical multistage VSD booster pumps were added along with two sets of 20” nanofiltration systems complete with water meters.
The municipal water supply to the tanks was fitted to a big boy valve. New copper pipework from the booster pump through to various bathrooms was used to feed toilets, urinals, showers and basins.
One of the challenges that the team faced was getting the water tanks over a 3m high building entrance and into a courtyard- using the height of the delivery trucks to make the lifting process easier
Pulse water meters were installed, and these are linked to a software system that the building manager has both on his desktop and on an app. This way, the total water usage can be monitored based on the amount of municipal water used compared to the rainwater that fills the tanks.
A section of the large system.
There is a meter on municipal incoming water and on the outgoing boosted water supply
The system is self-sufficient and ongoing maintenance every six months is done to check and replace filter cartridges and service booster pumps.
Due to the age of the hospital there was an old network of galvanised pipes- so connections had to be made carefully so as not to compromise the old pipework.
Suppliers: Burgess Plumbing- Main Contractor HMS Pumps Purerain Heunis Sheet Metal JoJo Tanks PA
Six JoJo tanks were used in the system.
You can’ t have a rainwater system without a pump.
www. plumbingafrica. co. za @ plumbingonline @ plumbingonline @ PlumbingAfricaOnline June 2025 Volume 31 I Number 04