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It is important to keep track of the amount of water that runs through a homemade fallout water filter because the soil and towel must be changed out after 50 quarts of water has been processed through it.
Water Containment Systems
Large quantities of water can be stored through the use of a water containment system that captures rainwater from the roof. One inch of rainwater on a 20 foot by 20 foot roof can generate 1,200 gallons of water. The water is collected through gutters and downspouts that are routed into containment barrels.
It is possible to make your own inexpensively (instructions below), but you must be certain the barrels used are food grade quality and when purchasing used barrels, you need to verify they did not contain chemicals or other hazardous materials.
DIY Water Containment System
Install a faucet near the base of a 55-gallon food grade plastic barrel, leaving enough room to draw water into a container. Once you’ve determined the placement where you will be installing the faucet, drill a one-inch hole. Now spread silicone around the threads of the faucet. Insert the faucet into the hole and secure it with a ¾ inch female adapter made of PVC.