Commercial Rainwater Harvesting Systems

Introducing the “RainBox” commercial rainwater harvesting systems. Complete off-the-shelf systems delivered to site.

Simply choose the control type and tank sizes you require.


Control Types

There are two different control types with these systems:

  1. Combi/Boosted Pressure
  2. Gravity-Fed/Indirect Pressure

Combi/Boosted Pressure

Collected rainwater is pumped from the underground storage tank via a submersible pump to a low-level break tank situated in the building.

From here the rainwater is pumped from the break tank via the booster pump system to the points of use, toilets, urinals, etc.

Gravity-Fed/Indirect Pressure

As with the combi/boosted pressure system, rainwater is pumped from the underground storage tank via a submersible pump.

The difference is, it is pumped to a high-level header tank which will most likely be installed in the building loft/attic space.

From here the rainwater is fed by gravity (hence the name gravity-fed/ indirect pressure system) to the points of use.

If your building does not have a high-level space for a header tank then the combi/boosted pressure system would be the system for you.


Tank Sizes

Underground Rainwater Storage Tanks

With these systems, you have the option to have a 6000, 8000, 10000, 12000, 14000, 16000-litre  GRP underground water tank.

Header Tanks (Gravity-Fed/Indirect Pressure System)

With this system, you can choose either a  500, 1000, 1500, 2000-litre GRP header tank.


How Does The System Work?

Rainwater is collected from your roof area; it is then passed through a filter system which removes any large pieces of debris, leaves, etc. and then into the underground storage tank via a calmed inlet which is designed to stop the disturbance of any sediment in the bottom of the tank.

Collected rainwater is pumped from the underground storage tank via a submersible pump to a low-level or high-level tank (depending on the control type you require) which is installed in the building.

From here the rainwater is pumped or fed by gravity from the break tank to the points of use, such as toilets, urinals, outside tap, etc.

Too much rain

Excess rainwater will pass through a siphoned overflow fitted to the tank – to be connected to the storm drain or soakaway.

Not enough rain

If there has been insufficient rainfall and the storage tank is running low the control system will introduce mains water into the break tank, but only the minimum required. Thus leaving maximum capacity to receive the next rainfall and ensuring there is no interruption of water supplied to the serviced appliances.

Up to 80% of commercial main water can be replaced by rainwater harvesting!


Looking for a custom made commercial rainwater harvesting system?

Please contact us, we will be happy to help!

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Tel: 01636 653082

Commercial Rainwater Harvesting