Quick Answer
Easily integrating a cistern into existing systems involves sizing it correctly, choosing the right location, and selecting suitable piping and fittings. A well-planned cistern can significantly reduce water bills and ensure a steady supply during droughts or water outages. It's essential to consider the roof catchment area, rainfall data, and desired storage capacity.
Cistern Sizing Considerations
When integrating a cistern into an existing system, it’s crucial to size it correctly to meet the household’s water demands. A general rule of thumb is to size the cistern to collect 1-2 inches of rainfall from the roof catchment area. For example, a 1,500 square foot roof catchment area would require a 10,000 to 20,000 gallon cistern to collect 1-2 inches of rainfall.
Choosing the Right Location
The location of the cistern is critical to ensure its structural integrity and prevent contamination. It should be situated at least 10 feet away from any dwelling or other structures, and at least 5 feet above the adjacent grade. A cistern should also be located on a level surface, and the surrounding area should be compacted to prevent settling or shifting.
Piping and Fittings
Proper piping and fittings are essential to ensure a safe and efficient transfer of water from the cistern to the household. Use food-grade PVC or polyethylene pipes and fittings to prevent contamination. Install a check valve at the cistern outlet to prevent backflow and a pressure relief valve to regulate pressure. Consider using a float valve or a pressure-activated valve to control water flow to the household.
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