A rainbank is a system that collects and stores rainwater during wet periods, allowing for a seamless mains backup during dry spells.
It's an effective way of harvesting and conserving a valuable natural resource: water.
Rainbanks have been around for centuries, but they have recently gained popularity as droughts become more common and water prices rise. They are also used to reduce flooding by collecting rainfall in empty rainwater tank(s) before the water runs off the land. Rainbanks can come in all shapes and sizes, from simple barrel systems to large ground tanks or cisterns.
They can be installed anywhere there is adequate roof space or runoff areas, such as driveways, patios, or gardens. Many rainbank designs incorporate filtration technology to ensure that the stored water is clean and safe. Given 2022 was the ninth wettest year in record for Australia according to the Australian Bureau of Meteorology, rainbanks can become an integral way of helping the environment by capturing and reusing potentially wasted water.Rainbanks provide an economical solution for collecting rainwater as it requires little maintenance and can save money on water bills. It also helps reduce the strain on local water supplies because you can switch between rainwater and mains water. In other words, it provides seamless mains backup. It also reduces dependence on imported resources and minimises the impact of stormwater runoff on rivers and streams. Rainbanks are a great way to ensure that your home has access to clean drinking water during drought or water scarcity. Furthermore, using harvested rainwater for gardening or landscaping can help conserve energy because you don't need to use potable water from the garden tap or have it delivered by tanker truck. The benefits of a rainbank extend beyond just reducing your water bill; they also benefit the environment by reducing the amount of water that runs off roofs and driveways into nearby streams and rivers, thus reducing the risk of flooding. Additionally, rainwater harvesting helps reduce pollutants from entering creeks and rivers by allowing them to be filtered before use.
The cost of installing a rainbank varies depending on the type and size of the installed system. The most basic systems, such as barrel systems, are relatively inexpensive and can be purchased for under $500. Larger systems that include cisterns or tanks may require more extensive excavation and plumbing work, increasing the cost to several thousand dollars. Additionally, you may need to purchase a controller if your system is automated. The controller switches between rainwater and mains water automatically. Rainbank controllers range in price up to several hundred dollars depending on features such as internet connectivity and additional sensors. You should also factor in the cost of periodic maintenance for any system you install to keep it running smoothly.
In most cases, a pump is not necessary for your rainwater tank. Rainbanks are designed to rely on gravity to provide water from the tank to the point of use. That said, pumps, such as the Australian made stainless steel type, can be beneficial. A surface or submersible pump pumps rainwater to increase water pressure or links different tanks if several of them are connected in a series. If you decide to install a pump, make sure it is compatible with the type of system you have and that it is rated for outdoor use. Choose durable pumps like the Australian made stainless steel models. Some underground rainwater systems are designed to suit submersible pumps. Additionally, be aware that pumps require electricity and may increase your energy bills.
Rainbanks are relatively easy to maintain as long as they are installed properly and kept clean and free of debris. Simple systems, such as barrels, may only require occasional cleaning, while more complex systems must be checked regularly for potential problems. It is also essential to monitor the water levels in your tank and replace any filters periodically. If you have an automated system, check the controller and sensors regularly to ensure they are working properly. With regular maintenance, rainbanks should provide a reliable source of clean water without too much effort.
The main difference between a rainbank and a rainwater tank is that a rainbank typically consists of multiple tanks, while a single rainwater tank stores only one volume of water. Additionally, rainbanks often incorporate filtration systems, a rainbank controller, and other elements to maximize water efficiency, whereas traditional rainwater tanks generally store the collected water. A rainbank is an automatic system, thus more expensive than individual tanks because they require more complex installation and maintenance. However, they can be an ideal solution for large-scale or commercial applications.
The capacity of a rainbank depends on the size and number of tanks that are used. The most common sizes for residential rainbanks range from 500 to 5,000 litres, but larger systems up to 10,000 litres or more can be installed if needed. Generally speaking, you will want to install a system with enough capacity to meet your household water needs, such as toilet and laundry applications, for at least one month in case of extended dry periods. Much larger systems may be necessary for commercial applications depending on the specific requirements. It is always best to consult an expert when choosing the size of your rainbank to ensure it meets both your current and future needs.
A rainbank consists of several tanks that collect and store rainwater from the roof or other surfaces. The water is then filtered to remove any contaminants before being pumped, if necessary, to the point of use. If you have an automated system, sensors will detect when there is enough water in the tank and send a signal that automatically switches between rainwater and the mains.
Many systems also include controllers that can be programmed with specific instructions for managing your rainwater supply. The rainbank is an automatic system that supplies water seamlessly, even with electrical interruptions. When it senses an empty tank, it automatically switches between rainwater and mains water.
Rainbanks are typically used for residential and commercial applications as an efficient way of harvesting rainwater and supplying water for toilet and laundry applications. By incorporating the right components and performing regular maintenance, a rainbank can be an effective way to ensure you have a reliable water source for your home or business.
With proper installation by a trained technician or plumber, a rainbank can be a great way to make use of precious rainwater and save on your energy bills. A good quality system should provide clean water while remaining easy to manage. It is important to remember that pumps may be necessary depending on the size of your system, so make sure you understand what type of pump is needed before making any purchases. Additionally, consider how much water you need to choose the appropriate tank capacity for your application.It is important to have an expert ensure all connections are properly sealed and functioning properly, as improper installation can lead to water leaks or other problems. Once installed, regular maintenance will be required to keep your system working efficiently. This may include inspecting tanks for cracks or clogs and cleaning off any debris from the roof gutters. Additionally, you should ensure that filters and pumps are working correctly and that all tanks are at the appropriate water level.