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CCAT rainwater catchment system/Literature review
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=== Tank === The most expensive component of a rainwater catchment system is the storage tank.<ref>The Texas Manual on Rainwater Harvesting</ref> Luckily, we are able to reuse the original tank that was donated to CCAT. It is made of grey corrugated polypropylene. As with any material, there are advantages and disadvantages: '''Advantages or polypropylene''' * Relatively inexpensive * Lightweight * Durable * Long lasting '''Disadvantages of polypropylene''' * Must be installed above ground, as standard tanks cannot withstand soil expansion and contraction * The plumbing fittings might leak<ref>ibid.</ref> The tank is 7ft tall with a diamiter of 5ft, cylindrical in shape. According to John Gould, cylindrical or spherical shaped tanks optimize the use of materials and increase the strength of the tank walls.<ref>Rainwater Catchment Systems of Domestic Supply</ref>
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