Selecting a Tank

West Coast Poly water tanks receive rainwater from your roof and collect it for later use. You can then use the stored water around your home and garden.

A rainwater tank not only reduces the use of mains water, it CONSERVES WATER.

Have you ever watched the rainwater cascading down the guttering and downpipes on a rainy day and thought “What a Waste”. Installing a rainwater tank is a simple, effective and low energy way of achieving great water savings.

Use simply as a free standing independent supply, or connect to the household for greater usage.

Where To Place Your Tank

Deciding where to place your tank will be greatly influenced by how much space you have. This will also help decide the size and shape of your tank; check out our products to find the tank that’s right for your home.

If you wanted a large capacity tank but space is an issue, you could use two or more smaller tanks to equal the same storage capacity by linking the tanks together, or perhaps placing at different positions around the home.

When selecting a site to place your water tank also give consideration to maximising the best possible position to capture water from your roof.  Try to place the tank as close to a downpipe as possible, this will minimise pipe work at installation time.

Your tank will require stable base, so select a smooth, firm, level surface on which to site the tank (paving, concrete and sand are all suitable), keeping in mind 1 litre of water = 1kg!

Usage Calculator

How much is used in your home each week?

The table below show figures for average water consumption for each activity.

What Size Tank?

The size tank you require will also depend on space available, consider checking you approximate roof space and annual rainfall as a guideline for how much water you could harvest.

Consider what you want to use the water for; watering the garden, washing the car, drinking and cooking with, or perhaps to top up the swimming pool. You may be surprised just how much water you can collect and this is just the beginning to cutting down on mains water consumption.

If you are not quite sure on tank size, it always pays to put in a larger tank than you think you will need to ensure you have enough water when you need it. Additionally, you can plumb in your tank to the toilet/s and cold water line to the laundry to save even more reliance on mains water.

Tanks come in a variety of sizes, shapes & colours.  Just because you have little space does not mean you can’t have a rainwater tank!

The Biggest Savings Are Inside The Home

The greatest water saving are made by supplying appliances like washing machines and toilets which use large volumes of water all year round.  These two items use around 250 litres per day or half of all the water consumed in the average household.  Given the Perth Metro rainfall pattern where most of the rain falls from mid April to mid October, a modest 2,500 litre tank could easily sustain a supply of water to a one or more household appliances for this period without the need to supplement the supply with mains water.

Increasing the tank size does not greatly improve the efficiency factor as it is based on the number of refills related to the rainfall pattern in this period.

Rainwater Harvesting packages consisting of a tank + pumping system + filter are available from West Coast Poly. These packages can be designed with different sized tanks and pumping systems to suit the individual needs and applications.