complete dependency on the town mains water supply for our house and
garden should stop. Perth’s average rainfall is now a lot less
than it used to be in the past. Charges for excess water are increasing
rapidly, bore owners are facing greater restrictions and garden watering
is now only 2 days per week.
are some options to reduce your dependency on the town mains water:
1. Capturing the rainwater that falls on your house roof, collecting that
water and then using it in either the garden, selected fixtures of the
house or all of the house.
2. Capturing the greywater from the bathroom and the laundry and sending
that water to your gardens. These are two very possible options to
becoming more self sufficient and sustainable with your water usage.
Large Greywater tanks - installed Perth Australia
average new house being built in Perth is well over 200 m².
In an average rainfall year allowing for flushing, filtering, and some
wastage this size of house could collect 120 000 liters per year.
a family of 4 people and by installing a 10 000 liter tank, approximately
90 % of that rainwater would get used at that house. 108 000 liters
of rainwater in a year is a significant contribution to your overall
tanks can be installed in the ground hidden away, be made from poly
plastic or zinculume/ colourbond. They come in tall round and sort
squat shapes as well as slimline and expandable sacks. Sizes range
from 250 liters to over 100 000 liters.
Poly tank plumbed with flush device - installation Perth Australia
people opt to connect 1 or 2 downpipes to a tank that has a submersible
pump that supplies the toilet/s and washing machine. It comes with
a switching device that senses when the rainwater has run out and diverts
back to the mains water.
cheaper option is to collect that rainwater in Winter and then use
it on the gardens over Summer with a hose or watering can. With the
aid of flushing devices, leaf diverters, gutter mesh, and a variety
of filters, as well as UV filtration rainwater can be used for drinking
in Public places. Federal rebates are available for rainwater systems
plumbed into the house.
Rainwater switch and
filtration - installed Perth Australia
Underground rainwater tank - installation Perth Australia
waste that water running down the shower drain. Approximately 9 liters
per minute from a modern shower rose is going to waste unless it’s
being re-used on the garden via a Greywater system. Greywater that
is suitable for the garden comes from the shower/bath, vanities and
basins, and the laundry.
In Perth and Fremantle a list of the approved systems can be found at
the Department of Health website.
majority are diversion systems meaning the selected fixtures (i.e shower)
drainage pipe is cut and diverted to the greywater tank, where it is
filtered and then pumped via sub-surface irrigation to the garden.
This generally all happens automatically. Maintenance will include
some cleaning of filters.
Greywater Tanks - Installed Perth Australia
Greywater system needs to have an application made to the local Council
prior to installing. This will show the Approval number of the system,
what fixtures are being captured, and a drawing showing the irrigation
inspection of the final system is needed to get a ‘Permit to Use’ There
are certain rules regarding the minimum area of irrigation required depending
on how many bedrooms are in the house and setbacks from boundaries and
greywater needs to be sub-surface drip irrigated to avoid contact with
humans. Generally people who install a Greywater system will switch
to using organic products in the bathroom and laundry. Many laundry
detergents contain high quantities of Sodium and Phosphates which are
detrimental to most plants. Greywater can make a significant contribution
towards a sustainable garden that is less dependent on mains water.
more information call or email Mark Harland at Water Capture:
Phone 9433 3262