GRAF UK has launched a range of rainwater harvesting systems designed to maximise the use of free rainwater rather than rely on mains water top-ups.
The AA rainwater harvesting range is said to buck the trend for most such systems to top up underground tanks with mains water, which means the space set aside for free rainwater is compromised by water the homeowner is already paying for.
In the new GRAF systems, the mains water feeds directly into the plumbing rather than via the tank, so full tank capacity is preserved for rainwater.
GRAF said the range is so versatile that only two products or systems are required – the standard AA Eco-Plus and the advanced AA Silentio – with the tanks manufactured from 100% recycled plastic and built to hold between 1,500 and 7,500 litres.
Both systems are designed for non-potable uses throughout the property, providing a supply of rainwater for toilet flushing, washing machines, garden irrigation, and general outdoor cleaning.
If the stored rainwater level becomes low, the system automatically switches to mains water via an integrated cistern beneath the pump unit. Rainwater is gathered from the roof and channelled through downpipes into the underground tanks which are designed for shallow installation and ease of access. As the water enters the tanks, it passes through GRAF’s filters, ensuring stored water remains free from leaves and debris.
An external pump and control unit installed within the property draws water from the tank as needed using a floating intake.
Both the AA Eco-Plus and AA Silentio systems are supplied with a telescopic dome shaft and pedestrian lid, with the option to upgrade to a vehicle-loading lid for driveways or areas with traffic.
