Ecozi provide rainwater harvesting solutions for Tesco.

1. Ecozi Case Study
Tesco Extra Havant - Rainwater Harvesting
Client: Tesco
Building Type: Food and retail store
Roof: 100% mono pitch with sheet cover and syphonic drainage
Catchment Area: 800m²
Rainwater Apps: 14 WCs for public and staff use and 2 home delivery van washdown
points
Built: 2009
Ecozi Ltd, Unit 2 Churchlands Business Park
Ufton Road, Harbury
CV33 9QX
01926 614 002
info@ecozi.com
www.harvestingrainwater.co.uk

2. About Ecozi – Rainwater Harvesting Systems:
Ecozi is a specialist rainwater harvesting and grey water recycling system provider.
Ecozi design, supply, install and maintain water recycling systems throughout the UK for commercial and residential
customers.
Ecozi work to all industry standards and are members of the UK Rainwater Harvesting Association. With our
experience from installation, commissioning and maintenance the service levels offered by Ecozi are amongst the
highest in the industry.
Market leading German manufacturers are key supply partners to Ecozi, providing advanced reliable systems with low
risks to end customers.
Ecozi Ltd, Unit 2 Churchlands Business Park
Ufton Road, Harbury
CV33 9QX
01926 614 002
info@ecozi.com
www.harvestingrainwater.co.uk

3. About the Project:
Rainwater Harvesting Requirements
This second generation Tesco store is built on columns to provide a larger store area and car parking than the original store.
To meet the planning conditions allowing for the increase site density the SUDS plan required rainwater harvesting. Build by Vinci with Essex
Services as the M&E contractor Ecozi provided design assistance for the scheme that had to utilize an above ground tank due to the high
density piles for the building columns.
The rainwater applications were WCs (public and staff and 2 home delivery wash down points). Due to the 24hr operation 7 days a week the
rainwater system required robust design with flexible architecture to cater for several eventualities.
Ecozi Ltd, Unit 2 Churchlands Business Park
Ufton Road, Harbury
CV33 9QX
01926 614 002
info@ecozi.com
www.harvestingrainwater.co.uk

4. Project Challenges:
The mechanical plant room was built off-site and craned on to the roof. The rainwater if lifted by a tank located pump into the specialized
hybrid rainwater booster set—HyproDuo. The rainwater is kept in a stainless steel 280L cylinder and pressurized as required on demand to
supply the WCs and wash down points. A fine particle filter and UV filter was specified for additional treatment.
The hybrid system provides the best design available and enables the user to operate on mains water without the main tank being in service.
This is especially useful in the event of contaminated water in the main tank and tank servicing. Keeping the main pressure pumps in the
plant room also provides much simpler and easy maintenance.
The advanced HyproDuo appliance is factory tested and has advanced logic control to enable continued operation even with faults or failed
pump(s) The surface mounted tank is sectional, insulated GRP with a nominal 12,000L capacity.
Two stainless steel pre-tank filters remove debris from the syphonic drainage system . Only 800m² of the roof area was
available due to the roof type and risk of contamination from the partially trafficked roof by vehicles. Ecozi provided system design, supply,
installation and commissioning services.
Ecozi Ltd, Unit 2 Churchlands Business Park
Ufton Road, Harbury
CV33 9QX
01926 614 002
info@ecozi.com
www.harvestingrainwater.co.uk

5. Contact Details:
Ecozi Ltd
Unit 2 Churchlands Business Park
Ufton Road
Harbury
CV33 9QX
Tel:01926 614 002
Email: info@ecozi.com
Visit our website at: www.ecozi.com
Subscribe to our blog: www.harvestingrainwater.co.uk
Join in the conversation via our Social Media Channels:
Facebook
Twitter
Google+
Linkedin