Self builders

Rainwater harvesting for house builders

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From pioneering self builders and specialist developers to housing associations Ecozi has flexible rainwater harvesting options. From single systems for detached homes to shared systems for terraced, multiple or community housing Ecozi will suggest an economical solution to meet your needs.

Self Builders

Long since recognised as pioneers for new technology in self built homes the self build market continues to grow. More and more self builders choose to incorporate rainwater harvesting. The Ecozi solutions are designed for simple low cost installation and simple maintenance.

Applications

Acceptable applications for rainwater are toilet flushing, laundry, garden and vehicle irrigation and general cleaning.

Water Savings

A family of four who use rainwater harvesting for all accepted applications would save about 66m³ of mains water per year. The financial savings per year are complex and vary depending on where you live in the UK. South West Water and Wessex currently have the highest water prices and are rising at the highest rates too. In these two areas the water price is from approximately £1.45m³. The larger the roof and the more irrigation water used the quicker the payback. Water is currently priced at a low rate in the South of the UK where demand and supply are stretched. The long term price of water is predicted to continue to increase at above inflation rates.

Other Benefits

  • Irrigation use during hosepipe bans
  • Improved feel to laundry using soft rain water if you live in a hard water area
  • Reduced risk to increasing water prices
  • Higher ratings for BRE and Sustainable Homes assessments

Installation Costs

For a new build installation costs of a rainwater harvesting system are low. The majority of tasks required to install a rainwater harvesting system have to be done anyway for a new build. The largest additional task is excavating the tank hole. This cost will depend on whether you have to muck-away the spoil. Installing rainwater harvesting should result in smaller soakaways so the net cost to excavate the tank hole is mitigated. Laying drains is not an additional task in a new build. One new service duct from the tank location to the location inside the house where the control unit is to be located is required. Internal piping for rainwater harvesting is installed according to standard plumbing best practice; the only difference is the rainwater harvesting appliances require a dedicated piping network originating from the rainwater harvesting control unit. The extra plumbing over and above that of a new build will usually be no more than 25m. Hook-up and commissioning of the control unit will take about ½ a day.

Specialist Developers

Rainwater harvesting can complement the creation of unique homes of any dimension. At the top end of the market large homes can collect maximum water volumes for irrigation purposes or topping up a swimming pool and have a second system for internal applications. Terraced or high density housing can utilize shared schemes to make the equipment costs affordable and the whole concept more sustainable.

Accreditations

Rainwater harvesting systems score positively during BRE and Code for Sustainable Homes assessments

Water Savings

A family of four who use rainwater harvesting for all accepted applications would save about 66m³ of mains water per year. The financial savings per year are complex and vary depending on where you live in the UK. South West Water and Wessex currently have the highest water prices and are rising at the highest rates too. In these two areas the water price is from approximately £1.45m³. The larger the roof and the more irrigation water used the quicker the payback. Water is currently priced at a relatively low rate in the South of the UK where demand and supply are stretched. The long term price trend of water is predicted to continue to increase at above inflation rates.

Installation Costs

For a new build installation costs of a rainwater harvesting system are low. The majority of tasks required to install a rainwater harvesting system have to be done anyway for a new build

Housing Associations

Rainwater harvesting costs can be brought down to an acceptable level for large market sectors when the system is shared or has common components. Shared tanks or even whole systems are the way to get the cost of equipment down per dwelling. Terraced homes really need to have shared rainwater harvesting due to the roof form, it is not easy nor best practice to divide up a terraced roof for rain water collection purposes.

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"We like German built products as they are good at detailed design. We're very pleased we chose Ecozi – as were our builders.  The system came pre-assembled and proved easy to install"

Maureen Collyer  Self Builder

Self build datasheet