RainWater Harvesting Ltd

RainWater Harvesting Ltd
Unit A Harrier Park
Southgate Way
Orton Southgate
Peterborough
PE2 6YQ
Tel:  +44 (0)1733 405111
Fax:  +44 (0)1733 230966
Email: 
info@rainwaterharvesting.co.uk
Website: 
www.rainwaterharvesting.co.uk
rps no: 26899   

RainWater Harvesting Ltd

®

 Registered Trademark

Introduction  Official pressure is 
growing year by year to develop the 
use in all new construction of 
rainwater harvesting which fulfils 
two planning requirements:
-  Saving on use of mains water 
-  Stormwater attenuation
The Code for Sustainable Homes 
sets water consumption targets at 
various levels and the Building 
Regulations Part G sets a 125 litres 
per person per day limit. The Flood 
and Water Management Bill 
stipulates council approval for 
surface water removal. 
RainWater Harvesting Ltd has kept 
abreast of these changes, perfecting 
its systems for all usage and 
developing the Rain Director

®

 

rainwater management system 
which reduces energy use by the 
pump.
Authority  The Rain Director has 
gained WRAS approval (0912064 of 
December 2009) and, with all other 
products, conforms to BS 8515 for 
rainwater harvesting and to 
international quality standards ISO 
9001 Design and Build, EN 976 and 
EN 858. Most products are listed on 
the Water Technology List and 
therefore qualify for tax relief.

The company provides a wide range 
of above- and below-ground storage 
tanks, normally provided with 
pumps, filters and components in a 
system that is ready to install. 
Above-ground tanks may be more 
cost-effective, but the rainwater will 
not remain as fresh and cool as 
water kept in an underground tank 
(there is no bacterial activity below 
about 15-20°C). Supply from the 
main storage tank to where 
rainwater is needed can be either 
direct or indirect (gravity). In a direct 
system, the pump supplies rainwater 
to where it is needed and operates 
every time water is drawn. In an 
indirect system, rainwater is pumped 
from the main storage tank to a 
holding header tank that gravity 
feeds to where it is needed. 

Direct feed systems  Where a 
header tank is not suitable, the 
submerged pump feeds appliances 
directly. Systems are supplied with 
the company's Rain Backup in a 
Box

®  

which provides a simple and 

inexpensive mains back-up solution 
that partially fills the main storage 
tank with mains water. It includes 
the AA air gap. 

Indirect (gravity) feed systems
With some gravity-free systems, 
water levels in the header tank are 
controlled with standard float valves 
and, as with direct supply, the pump 
is activated when water is drawn.
However the more advanced Rain 
Director gravity-feed system, with 
computerised control panel and 
smart header tank, saves on energy 
use by activating the pump only 
when the smart header tank is 
empty rather than every time water 
is drawn. The pump is not hunting to 
maintain pressure & electrical power 
use is reduced by at least five fold. 
The Rain Director:
-  Provides automatic and manual   
  mains backup 
-  Prolongs pump and appliance    
  valve life
-  Provides water during power cuts
-  Overcomes bacterial action and   
  pump noise
During a drought, the Rain Director 
can be switched to mains water for 
WCs and the washing machine in 
the house. Rainwater is thus 
conserved for the garden & can be 
used if a hosepipe ban is imposed.
Components include the header 
tank and computerised control panel 
& incorporate the regulation AA air 
gap. When rainwater runs out, the 
header tank fills with mains water.

Tanks include the German tried and 
tested GRAF range. Carat tanks are 
supplied in 2 halves which facilitates 
distribution and site handling. They 
can be combined for larger capacity 
needs. Rondus and Platin tanks do 
not require to be dug in as deeply as 
the Carat tanks. These high quality 
injection-moulded tanks do not 
normally require concreting in except 
where there is a high water table.

Multi-dwellings  The company 
specialises in housing developments 
for which The Rain Director, which 
allows mains electrical use and 
mains water back-up to be 
separately metered, is ideal. Costs 
are reduced by sharing the 
underground storage tank between 
several dwellings. Occupants have 
control over their rainwater supply. 

Flood attenuation  RainWater 
Harvesting Ltd supplies lightweight 
and easily installed 300 litre GRAF 
drainage anti-flooding blocks which 
allow water to clear quickly from 
drives, car parks, sports pitches, 
lawns and areas prone to localised 
flooding. They can also be used for 

the soakaway needed for excess 
water from a rainwater harvesting 
tank. The company's flood 
attenuation calculator gives the 
number of crates required for the 
surface water volume stipulated by 
planners.

Warranties offered are:
Tanks 

15 years

All other components 

2 years

Delivery, normally within 2 - 5 days, 
is free of charge within the UK 
excluding Highlands and Islands. 
Services include:
-  Assessment of site plans and tank  
  size calculation 
-  On-site visits and installation  

 

  service, full pre- and post-delivery  
  technical advice by phone  

 

  and email. 

Full product details, information on 
regulatory issues (e.g. piping and 
labelling to distinguish rainwater 
from mains), prices, warranty terms 
& conditions and tank size calculator   
are on the company's website. 
Brochures and case studies are 
available from the company.