Rainwater Harvesting Systems

Non-pressurised system

Rainwater is channelled from the roof into the storage tank, passing an integrated filter to remove large debris, leaves etc. Water enters the tank via an inlet calmer preventing disturbance to fine sediment on the base of the tank. Excess rainwater flows out of an overflow which has a one-way valve and rodent protection; also skimming surface particles. Inside the tank are sensors and a submersible pump which on demand take water from the cleanest part of the tank through a floating suction filter supplying filtered rainwater to the break tank. This tank gravity supplies water to point of use, it is possible to have the break tank at any level in the building when combined with a booster unit sized for the specific building requirements. During periods of low rainfall a WRAS compliant mains water top-up provides a continuous failsafe supply. More than one break tank can be used in a system - our Technical team can offer design assistance to ensure the most economic solution is applied.

Pressurised system

This system may be required in buildings with low water consumption, where roof space for a header tank is limited or where a pressurised supply is required for applications. Rainwater collection and flow within the pressurised system follows the same process as the non pressurised system - the main difference being that water enters the control system and flows via a pressurisation unit as a direct supply to points of use. In periods of low rainfall a WRAS compliant mains water backup activates, providing a continuous water supply. This tops-up a percentage of the underground storage tank.

This type of system is only recommended within certain applications and it is best to discuss the individual requirements with the Technical team.

Combi system

This is a unique control system combining the benefits of both a gravity-fed header tank system and the pressurised supply of a boosted water system.

As with our other systems, rainwater follows the same journey until it reaches the control unit. Instead of the normal control unit a Combi unit is fitted, where water is stored awaiting distribution by the energy efficient variable speed booster; providing water at pressure to a range of applications without the need for large header tanks. The system also features mains water back-up and WRAS compliant air-break to provide a continuous water supply
All of our rainwater recovery systems will make the most economic use of the local rainfall with predicted water consumption. It is recommended that you liaise with the Technical Team to help you choose the correct type of system for your customer's application and that you choose low water consuming products to complement the system, furthering a reduction in overall consumption.

BSS can provide you with a Specification and Price tailored to your project.

Complete the project enquiry form or find your local branch to request a visit to your project on site.

What equipment is included in your BSS Rainwater Harvesting system?

Storage Tank

• Underground single chamber tank
• Above ground sectional tank
• Above ground single piece tank (either vertical or horizontal)

To create larger capacities, tanks can be linked together with the fittings supplied. 

Filters

To protect the holding tank and pumps from leaves and sediment.

Main Control Panel / Processor Unit

For automatic system control. Option to connect to a variety of Building Management Systems to provide information about the system, such as how much rainwater or mains water has been used and details of pump operation and filter cleaning.

Header Tank

We can supply a range of header tanks suitable for the non-pressurised system. Tanks are designed to be compliant with the Water Supply (Water Fittings) Regulations 1999 to protect the integrity of the mains water supply.

Pumps

• Duty and stand-by or duty assist systems are available.
• Otherpumps are available for specialist site specifications.