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Click on the TV above to watch a Graf video on rainwater harvesting
New video showing assembly of a Graf Carat tank

Download our fitting instructions for the Carat system

Rainwater Harvesting: Use of mass-produced underground storage tanks and the Rain Director® in Multi-home Developments and Commercial Buildings

Extract showing key arguments made in this white paper. Read Complete White Paper

1. Mass produced two-piece tanks such as the Carat Range from Otto Graf GmbH in Germany are cheaper to manufacture, transport and install than one piece laid-up fibre glass or steel framed and GRP sectional tanks.
 

2. The long guarantees on these products and the perfection of the seal between the two halves now makes these tanks ideal for larger scale professional applications.

3. In the case of multi-home developments, the developer can take advice from the experts whether or not to install header tanks, and if so whether to have one in each home or share. Sharing rainwater between dwellings is usually acceptable but sharing mains water is not: therefore a device which admits mains water to the rainwater tank is not acceptable. Clearly, a device which admits mains water backup to a header tank in each dwelling is essential. A plain header tank with float cocks for rain and mains is also unsuitable because the rainwater would go yellow in the warmth of the roof space; a smart header tank with automatic recirculation of rainwater (especially when the occupants leave, for example, on holiday) is essential.

4. A automated rainwater management device with header tank designed for managing rainwater around the home is therefore ideal for multi-home developments and commercial buildings. This paper outlines principles and typical installations.

Read Complete White Paper "Rainwater Harvesting: Use of mass-produced underground storage tanks and the Rain Director® in Multi-home Developments and Commercial Buildings"

Authored by Marcus Bicknell, Partner Marketing and Technical Rainwater Harvesting Ltd

rainwater harvesting systems

systems with Rain Director