Raincatcher's filtration system

 
 
 

Every time it rains, water droplets from tiny particles of matter known as condensation nuclei.  Such nuclei consist of dust, salt from the ocean spray, and chemicals.  Some of these chemicals form when gasses in the air react with each other, while the others are given off by industrial plants and motor vehicles.  The first portion of water droplets clean the air by absorbing dust and chemical particles on their journey to earth..... ( You may have noticed that the air is clearer and fresher after a rainfall ).  The initial rainfall also clears pollutants from roofs and gutters.  Raincatcher's filtration system diverts the tainted water away, ensuring only the clean rainwater enters the drinking water supply. 
How is this done?

     
The rainwater runs through a stainless steel sieve which eliminates leaves, etc, and from there flows into the dump tank. This tank holds the initial rainwater which may be tainted by dissolved material from the guttering. This unclean water slowly filters out into an overflow pipe and then into your down pipe.
 
When the dump tank is full the remainder of the rainfall gets diverted into the main body of the tank, which stores 230 litres. This is the cleanest water abtainable from the rainfall. Every new rainfall continues through the filtration cycle, and then enters and circulates with the stored water.
 

The main body is fitted with an overflow outlet at the 230 litre level, to enable excess water to discharge through the overflow pipe, and disperse to your storm water down pipe. This process ensures the drinking water remains fresh.

     
  Not every rainfall will help fill the main storage section, on days with only the occasional drizzle there would not be enough consistent rainfall to keep the dump tank full. However, even this is beneficial as it helps dispose of roof contaminants and assists with keeping the guttering clean and ready for the ensuing rainfall.