For your piece of mind, Aquarius products are made to meet the highest standards. Consider these factors:

• Tanks are made of UV stabilised / food grade polyethylene;
• The manufacturing process carries Benchmark Product Certification to consistently produce products to meet AS/NZS 4766:2006;
• Our rainwater tank's carry a 10 year repair or replacement warranty from the manufacturer.

• Seamless construction reduces potential for leaks;
• Lower cost than comparably sized alternative materials;
• Robust construction makes for easier handling;
• Poly products can be recycled at end of life.

Apart from the style of tank, there are a number of issues to consider when deciding on a rainwater collection system. The first is the balance between your intended rainwater usage and the amount of water you can collect.

The amount of water you need to collect will depend on the proposed water usage.

Tab through the table below to calculate your weekly water usage

The next step is to calculate your catchment area and the likely yield dependant on the average annual rainfall for your location. Bear in mind that rainfall is not consistent throughout the year, and that different areas of the roof link to different downpipes.

1mm of rain falling on 1 square metre of roof area will yield 1 litre of water. So in Sydney, where the average rainfall is 1200mm per year, 1 square metre will yield 1200 litres per year. Thus a catchment area of 50 square metres feeding one downpipe will yield 60,000 litres per year, while the average home roof of 170 square metres yields 204,000 litres per year.

That's over 200,000 litres delivered free each year to the average home at a time when water bills are set to skyrocket. Visit the Bureau of Meteorology to discover your average rainfall:

The outcome of this analysis will help you determine the catchment area and the capacity of tank required for your purpose. Other considerations then may influence the design of your rainwater collection system as detailed below.

• Select a tank of suitable capacity and shape for the space available - refer individual product information data. Above ground tanks are generally easier to install than underground or under floor/deck tanks and lend themselves to the connection of additional tanks at a later date;
• Bear in mind that most councils require building approval if the tank is greater than 10,000 litres; will not allow you to position a tank against the fence if it is taller than the fence; and require 450mm wide clear access beside the tank in a narrow passage if the tank is more than 1800mm high;
• Allow for the additional height of the inlet plumbing if positioning a tank under a window or where height is restricted.

• Ideally, position the tank next to a downpipe that collects water from a significant roof area, one that will give you the amount of water for the proposed use;
• Consider the installation of a Header Tank or Aquarius Diverter if the tank cannot be located close to a downpipe;
• Place the tank where the overflow can connect to the stormwater system.

Henley: 2 x 3000L Slimline Tanks

Improve the quality of water by installing a first flush device. This can be as simple as a 90mm diameter dropper that captures the first flush of water containing solid matter and particles. Once the dropper is filled, clean water then overflows to the tank. Over time, the first flush device empties the trapped water into the stormwater system in preparation for the next rainfall.

First flush devices are used in association with a leaf screener as a first step to improving the quality of your tank water. The installation of gutter guard will also improve the quality of water by eliminating solid matter that can decompose in the gutter and find its way into your tank.

Aquarius Watermaster has developed their unique internal First Flush Device that fits discretely in the tank inlet opening, eliminating the plumbing normally associated with traditional first flush devices. It has generous capacity and is easy to maintain.

• Consider the height difference between the tank outlet and the pump inlet (lift);
• Consider the height difference and distance between the pump outlet and the final use outlet (head);
• Consider the number of outlets that might be in use at once;
• Size the pump to take account of the lift, head and number of outlets in use simultaneously. While a small pump might supply water to a number of outlets at once, there will be a proportional drop in the rate of flow, even if the toilet only requires 10L/min and the washing machine 15L/min.

To maintain a seamless supply of water, particularly when connected to a cistern or washing machine, you will require either an Aquarius Mains Top Up Valve or a controller valve.

The Aquarius Mains Top Up Valve maintains a low level of water in the tank to ensure continuous supply.

A controller valve is a sophisticated device, usually requiring electricity, that activates the supply of mains water when the tank water runs dry.

Aquarius Watermaster has the experience to advise you on the equipment needed for a rainwater collection system and can even carry out and co-ordinate the complete installation.

When ready to proceed, we will carry out a detailed site inspection and provide you with a written quotation.

Save water - Help the environment - Add value to your property.
Aquarius Watermaster, 287 Mona Vale Rd, Terrey Hills 2084