A Doust Plumbing Product About Rainwatch Tel: (08) 9249 7039

Frequently Asked Questions

How much rain can a rainwater tank collect?

The average home has a roof area of 200m2, and with 40 mm of rain on that area, you could predictably catch 8,000 litres of fresh rainwater, while our flow tests have proven that the RainWatch Filter has the ability to clean rainwater in excess of 2000 liters an hour.


What are the guarantees on the RainWatch Filter and filter cloth?

We at Doust Plumbing Products have built our reputation on quality. Our new RainWatch Filter is proudly made in Australia from high quality impact acrylic materials and is fully backed by Australian consumer guarantees.


Can I attach RainWatch filtered water to my household utilities?

Yes, provided the installation is in accordance with all local bylaws and conducted by a qualified plumber/authorised installer in accordance with current legislation.


How often should the filter cloth be replaced?

We recommend you replace your filter cloth at least every three years depending on the amount of rainfall received during your wet season. The life of your filter pad will depend on the level of exposure your filter pad receives from all types of contaminants as this will also affect the life of the filter pad.


How often should the filter cloth be washed?

Doust Plumbing Products recommends you clean your filter cloth every 3-6 months or after each period of rain depending on the volume and frequency of rainfall and the level of exposure your filter received from contaminants.


Will having the filter before the tank affect rainwater catchment efficiency?

Yes, in our view the RainWatch Filter will increase the catchment efficiency of most current rainwater systems, as it will provide more uncontaminated water and is not impeded by high flow rates.

The RainWatch Filter is designed to facilitate high flow rates estimates at 2,000 litres per hour. This means that even in the heaviest of rain falls the RainWatch Filter should capture the water without overflow wasteage.

Does the filter provide drinkable/sterilised rainwater?

Whilst RainWatch has the ability to remove most airborne contaminants and microscopic particles, the RainWatch Filter is designed to be an addition to current rainwater filtration systems, not a replacement.

As the RainWatch Filter sits prior to the tank, and not point of use, sterilisation devices are still required to ensure that the water flowing from the rainwater tank to the point of use is treated to ensure that the water is non-hazardous in accordance with the relative drinking water bylaws.

Note: That with the RainWatch Filter installed, filtration and water treatment systems will require far less maintenance than if they were dealing with unfiltered or uncleaned rainwater.