My Final Semester Project....

THE TEST OF THE EFFECTIVENESS OF THE FIRST FLUSH WATER DIVERTER SYSTEM...

What is a Rainwater First Flush Device?

§ A first flush device is one that takes the first water from your roof and diverts it from your tank. So it effectively flushes your roof by diverting the first of the rain water away from your tank.

§ If it important to flush the roof and divert water from your tank, because over time your roof gets dust and dirt and debris from the environment. The rainwater effectively washes your roof. So if you do not use a first flush device, the first of the rainwater which will carry most of the dirt will go straight to your tank.

How does Rainwater First Flush Device Work?

§ A first flush diverter should always work automatically.

§ A first flush diverter should always be installed in the downpipes before the water reaches the tank. The first flush diverter has a floating ball inside it. As the first water is delivered to the tank, the water raises the ball to the top of the pipe which then closes off the first flush diverter. Any subsequent rain is then delivered directly to the tank.

How much water should be diverted on the first flush?

§ The amount of water that is diverted to the first flush device is determined by the area of the roof.

§ 0.2 litre per meter square of roof area

Why You Should Use Rainwater Tanks

Well, simply because you can save quite large amounts of water that you can then use in your home and garden.

§ By installing tanks you will safeguard your family in the event of public water restrictions

§ The use of previously collected water in low rainfall periods

§ Reduce the amount of water in the storm water drains by collecting it in your tanks

§ Using collected rainwater saves you money - it's free

Advantages of First Flush Water Diverters

§ Improves rainwater quality and safety

§ Extends the life of pumps and fixtures using rainwater (such as laundry, toilets, irrigation systems)

§ Reduces tank maintenance

THE RESULT OF THE TEST...

§ The system is fully functioning to removes most of the debris especially dirt from the roofs (eg: birds shits etc)

§ The result of water sample test shown a big difference from the bad condition of water in the storage from the better quality especially for the content faecal coliform in water storage.