How does the Carat In-Direct Rainwater Harvesting System work?

The indirect supply system is designed to support WCs, washing machines, irrigation, and outside cleaning purposes. Rainwater is collected from the roof of the property and fed into the underground tank via the downpipes. On entry to the tank, the water passes through a filter to prevent any debris from going into the tank. With this system, there is a pressure-sensitive pump located in the underground tank. When a valve or tap is opened, water will be pumped under pressure until the valve is closed, allowing the system to repressurise turning the power off to the pump. From the header tank, the water is gravity-fed to the WC’s, etc.

It is all automatic; whenever there is a demand for water, i.e., when the toilet is flushed, the harvested rainwater will be gravity fed to the toilet from the header tank, and then the header tank is topped up by the pump inside the underground tank. In periods without rainfall, the water level inside the underground tank will drop. When the rainwater level is too low, the pump will stop pumping harvested rainwater to the header tank. This, in turn, will result in the rainwater level in the header tank dropping. Inside the header tank, there is a floating ball valve that controls the top-up of mains water in periods with no rain. This means that the system maximises the use of all available rainwater.

If the system is to be used for garden irrigation, an outside tap should be installed on the pipework directly off the pump. A T-junction can be used to achieve this. This will imply that direct pump pressure is now supplying the garden tap. (NB: when the tank is low on rainwater, there will be no mains water top-up to the outside tap.)

Why choose the Carat In-Direct Rainwater Harvesting Package?

• Innovative Gravel Backfill: Our system uses gravel backfill, significantly reducing installation costs by £60 per cubic metre compared to concrete.
• Adaptable Installation with Vehicle Loading Lid: Space constraints? The vehicle loading lid allows for installation under driveways, maximising space and utility.
• Environmentally Responsible Design: The underground tank is made from 100% recycled plastic, showcasing our commitment to sustainability.
• European Market Leader Quality: Trust in a product renowned for its reliability and effectiveness in rainwater harvesting.
• Efficient Water Management: Equipped with an automatic submersible pump featuring automatic restart and dry-run protection, it ensures smooth and low-maintenance operation.
• Consistent Water Supply: The system includes an integrated mains water back-up, which automatically tops up the header tank with mains water when rainwater levels are low, guaranteeing a continual water supply.

Images are for illustrative purposes only, there is a possibility that certain products may have been upgraded or replaced with equivalent alternatives.