Quick Answer
Grey water storage tanks are designed to hold and transport water that has been collected from sinks, showers, and washing machines after the initial wastewater treatment. Choosing the right materials for these tanks is crucial to prevent contamination and ensure safe reuse of grey water. The best materials for grey water storage tanks are those that are durable, non-toxic, and resistant to corrosion.
Material Requirements for Grey Water Tanks
When selecting materials for grey water storage tanks, consider factors such as durability, chemical resistance, and ease of maintenance. HDPE (High-Density Polyethylene) tanks are a popular choice due to their durability and resistance to corrosion. They can withstand water pressures up to 40 psi and maintain their structural integrity for up to 20 years. HDPE tanks also have a smooth interior surface, making them easy to clean and resistant to bacterial growth.
Tank Size and Design Considerations
The size and design of grey water storage tanks also play a crucial role in ensuring safe and efficient reuse of grey water. Tanks should be designed to handle the expected water flow and storage capacity. A general rule of thumb is to size tanks based on 1-2 gallons per minute (gpm) for each plumbing fixture. For example, a household with 3 showers and 2 sinks would require a tank with a minimum capacity of 6-12 gallons. Additionally, tanks should be designed with a minimum of 2-3 feet of headspace for easy maintenance and inspection.
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