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How to install a complete rain harvesting system


If you are considering purchasing a rainwater tank, we recommend installing a complete system to improve water quality and reduce tank maintenance. With a little planning, you can design and install a system that will not only give you good quality water, but will reduce your reliance on mains water. Rainwater that is captured and stored correctly is a safe, economical and sustainable source of quality water that can supply your complete requirements.


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How do first flush water diverters work when harvesting rainwater?


Fitting an appropriately sized First Flush Water Diverter is critical to achieve good quality water. Water Diverters improve water quality, reduce tank maintenance and protect pumps by preventing the first flush of water, which may contain contaminants from the roof, from entering the tank.When it rains, water slowly builds up in the roof guttering system before it exits through the downpipe. The first flush of water from the roof can contain amounts of bacteria from decomposed insects, skinks, bird and animal droppings and concentrated tannic acid. It may also contain sediments, water borne heavy metals and chemical residues, all of which are undesirable elements to have in a water storage system.


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In rainwater harvesting, what is a "wet system"


Are systems where the pipes from the gutter go down the wall and underground and then up into the tank. Many systems are “wet” because the size of buildings and the placement of tanks away from the buildings mean that there are long runs of pipe underground leading to a riser at the tank. Because the pipes are underground and below the entry point to the tank, even during periods without rainfall water remains in the pipes. "Wet" systems can be converted to "dry" using In-Ground Water Diverters, improving water quality and saving water in the process

In rainwater harvesting, what is a "dry system"


Wet systems are systems where the pipe system is designed to run direct from the gutter into the tank. The pipes drain out after rain and do not hold water when the rain stops. “Dry” systems are best because water sitting idle in pipes can become stagnant and provides a potential breeding ground for mosquitoes.

When harvesting rainwater, how much water should your first flush divert?


Industry experience and field testing suggests that the amount of water diverted should be determined based on (1) the surface area of the roof, and (2) the amount of  pollutants on the roof.


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 Watch this video on how to install a tank gauge

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Watch this video on Clean Rain Diverters

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Watch this video on how to install & maintain a first flush diverter

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Watch this video on first flush water diverters

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