Available in kit form – just add PVC pipe
- Simple, effective and easy to install
- Includes Slow Release Control Valve - empties after rain and resets automatically
- Can be painted to match the home
- No mechanical parts – nothing to wear out
- Helps reduce pollution of your tank water!
- Essential when using rainwater inside or outside
- Amount of water diverted is customized to specific requirements of each roof
- Diverts contaminated water to the garden
- Protects rainwater pumps and internal appliances

First Flush Water Diverters improve rainwater quality and safety, help extend the life of pumps (used to distribute rainwater for use in and around the home) and internal appliances that draw upon rainwater (such as laundry, toilets, hot water systems and dishwashers), and reduce tank maintenance.

First Flush Diverters from Rain Harvesting are simple to install, operate automatically to help prevent pollution of tank water, and are available in a number of different sizes to suit specific requirements
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. First Flush Water Diverters (or Roof Washers) capture the first most contaminated rainwater from the roof and gutters, automatically diverting the subsequent cleaner rainwater to the storage 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.
Instead of flowing to the water tank, these pollutants are diverted with the initial flow of water into the chamber of the water diverter. The water diverters from Rain Harvesting utilise a dependable ball and seat system - a simple automatic system that does not rely on mechanical parts or manual intervention.
As the water level in the diverter chamber rises the ball floats, and once the chamber if full, the ball rests on a seat inside the diverter chamber preventing any further water entering the diverter. The subsequent flow of water is then automatically directed along the pipe system to the tank.
For a Water Diverter to work effectively, the contaminated water in the chamber must be sealed off. This prevents the water passing to the storage tank and ensure the water does not "syphon" off the contaminated water in the chamber. The simplest and surest way to do this is with a floating ball and seat.
A slow release valve ensures the chamber empties itself after rain and resets automatically. The diverted water need not be wasted water because the drain pipe from the diverter chamber can be fitted to a standard drip irrigation system.