5
HOW RAINBANK WORKS
1. When there is demand for water from your toilet, washing machine or garden
tap, RainBank senses this demand and checks the level of water in the rainwater
tank. Note: demand must be greater than 1.5 litres per minute or mains water
will be delivered.
2. If there is rainwater in the tank RainBank switches on the pump. The pressure
of the pump is sufficient to overcome the pressure of the mains water inside
RainBank and this moves a plunger and allows the rainwater to flow.
Note: mains water pressure is not restricted.
3. When there is no longer a demand for water, RainBank detects that water has
ceased to move inside the pipes, switches off the pump and waits for another
water demand.
4. If RainBank senses a water demand and detects insufficient water in the
rainwater tank it will automatically allow the mains water to flow.
5. If there is a power failure during a demand for water, RainBank will automatically
supply the mains water as backup.
What are the advantages of RainBank over conventional air-gap systems?
• RainBank is totally hands off for your customer and needs no maintenance or
adjustment.
• RainBank is easy to install.
• RainBank does not require mains water to be re-pressurised and therefore
saves energy.
• RainBank is WaterMark approved – this means plumbing inspections will be
approved & your plumbers insurance should cover installation faults.
• RainBank will provide mains water as backup when:
- there is no rainwater
- there is no electricity to run pump
- the pump has been removed for servicing. Air-gap systems rely on pumps to
pressurise all water and do not function without them.