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Published on Nov 2, 2015
Making the first flush diverter for my tiny house rain water collection system. The first flush diverter removes the filthy water from the roof when the rain first starts to fall and allows the cleaner water to pass through to your storage tanks.
I am making my first flush diverter out of PVC pipes and fittings. These are cheap and easy to work with. My first flush diverter cost me only about $60 and some change.
I have looked at retail first flush rain water diverters and most are way too small to be of any use and the price is about the same as for my homemade version.
My first flush diverter has no moving parts which means less maintenance and nothing to fail on you.
But this first flush rain water diverter must be located a little bit away from the down spout in order to prevent the gravity pressure from creating a suction force on the water in the diverter as it flows through the down spout. This would suck the debris back out of the diverter storage tank and out into your water cistern.
The roof of my tiny house on wheels has about 240 square feet of surface area so I only need to flush a couple gallons of water when it first starts to rain. By then most of the dirt will be washed off the roof and the cleaner water will be flowing.
As the first flush diverter fills up, the heavier dirt and debris will settle down into the bottom of the tank and the cleaner water will begin to rise up in the tank. As the level of the water reaches the top of the first flush dirverter, it will then be able to run through the output side and into my water cisterns.
The first flush diverter gives you cleaner water and improves the life of your entire water system.
Stay tuned for the installation of my tiny house first flush diverter.
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