Rainwater Harvesting, of Harrier Park, Orton Southgate, has joined forces with Channel 4’s Grand Designs Live to demonstrate the water-saving devices that will be an essential part of the houses built over the next few years.

The company, which distributes water-saving components from its warehouse base in Peterborough, is helping Grand Designs presenter Kevin McCloud to install one of its systems as part of an ambitious plan by Channel 4 to build a house in a week and called The House that Kevin Built project.

The home, which will feature a number of eco-build techniques and sustainable materials, will be constructed outside the ExCel centre in London, while the Grand Designs Live exhibition is running until Sunday.

And Channel 4 will be featuring the build project in a series of programmes from the venue from now until Friday.

Company founder Adrian Lester said: “When we received the call from the TV production team to request our help, we were surprised and delighted.

“This is a great opportunity to spread the word about Rainwater Harvesting and wider green issues.

“We are supplying an increasing number of kits to enlightened homeowners and self-builders, but we have yet to see serious interest from the major housebuilders.

He added: “Rainwater harvesting is a simple, effective way to capture and store rain from the roof, reducing the reliance on mains supplies.

“At the very least, it means you can water your garden, clean your car or fill your pond when there’s a hosepipe ban.

“But our more sophisticated systems use filtered rainwater to supply toilets and washing machines in the home.”

Rainwater Harvesting was set up two years ago and currently employs about 12 people.

n Rainwater Harvesting will be holding a prize draw for the storage kit used on the programme – and is inviting contestants to enter at the company’s website, www.rainwaterharvest ing.co.uk