Recently water demand has started to exceed supply, and localised flooding has become a huge issue in many parts of the U.K. Experts are now recognising the crucial role that rainwater harvesting (also known as rainwater recycling, and greywater recycling) has to play in alleviating both these problems. With strategic water planners looking to reduce the amount of water consumption per head going forward. Solutions such as Rainwater Harvesting will play a critical role.

The Rainstore Rainwater Harvesting systems have for options for your property. All underground Systems


Indirect Feed Mains Top Up System

Direct Feed Header Tank System

Garden Pro Garden and Irrigation System



The systems all come in a range of volumes from 1800 litre to 10,000 litres and in one piece moulded low profile tanks, that can be installed in granular surround. Saving significantly on overall installation. All systems are fitted with premium control/water management equipment, which includes high-quality pumps, in tanks filtration and control panels in the Indirect and Direct Feed systems.

Rainwater is captured from the specific roof areas and directed via designed drainage to a rainstore tank (usually underground). The incoming rainwater is filtered before entry to the tank. A highly efficient and reliable submersible pump then can deliver the water to a service on demand. Depending on the type of building or application a secondary tank (header tank) can be used to gravity feed the water to the point of use. The size of the storage tank is determined by considering the amount of water available for storage. This is determined from the size of the roof area and the local average rainfall and the amount of water likely to be used (a function of buildings occupancy and function). It is very important not to over-size the rainwater tank. An over-sized tank may result in a lower than expected quality of water.


Considerations for fitting a rainwater collection system to an existing property are:

The external drainage from the roof needs to be modified to bring the water to a central point being the rainstore tank.

Access for the Rainstore tank and excavation is required.


Internal plumbing is usually required to be separate out from the normal water supply.


Reasons to install a Rainstore rainwater harvesting system 


Rainwater harvesting (including rainwater recycling and some versions of grey water recycling) displaces a large proportion of the water that would otherwise be provided by the mains supply - thus reducing overall water supply costs.

It can provide an off-mains supply for remote areas.

It enhances a property and can completely satisfy the water requirements of the various levels of the Code for Sustainable Homes.

It can form part of an attenuation and rainwater management scheme, by reducing storm-water runoff and controlling the flow-rate off site. As required for SUR1.


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