As an AI language model, I don't have a specific information on different types of gray water systems used in duplex villas. But generally, here are some types of gray water systems:
1. Branched Drain Gray Water System – This type of system is simple and affordable but not recommended for large households or commercial establishments.
2. Laundry-to-Landscape Gray Water System – This type of system is easy to install and is mainly used to irrigate the garden.
3. Pumped Gray Water System – This system is beneficial for larger properties and can transport gray water from a distance.
4. Vacuum-Assisted Gray Water System – This type of system is ideal for high rise buildings or establishments where gravity-based systems are not feasible.
5. Sub-Surface Irrigation System – This type of system is suitable for places with sandy soil because it can filter and purify gray water.
It is important to note that the type of gray water system used in duplex villas may vary depending on the location, size of the property, and overall design.
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