The Storage Tank
The tank is manufactured in one piece from high quality LDPE, to form a watertight tank. It is supplied with an access cover, specially designed to stop ingress of water from above the tank. The cover is adjustable to meet finished levels, and is designed to keep loading away from the top of the tank. In this way the tank can be used underneath lightly trafficked driveways.
The filter incorporates a fine tubular mesh that removes fine particles from the flow. The filter is flushed when subjected to a significant inflow and the filtered material is ejected through the overflow to the surface water drain or soakaway. The filter cartridge can be easily removed for cleaning using the supplied handle.
An internal filter is pre-fitted to your StormBank® tank, suitable for up to 200 m2 of roof drainage. For larger roof areas (up to 450 m2) an external filter can be supplied that is also easily accessed from ground level.
The Control Panel
The control panel combines a rainwater connection from the StormBank® tank to the supply pipework and the mains top-up supply to the tank. The operation of the pump is switched via a pump control, to supply rainwater on demand. A junction box is linked to a float switch in the tank and triggers a solenoid valve to supply mains water to the tank at times of low rainfall.
The submersible pump sits inside the tank, operating on demand from the control panel. The floated inlet filter takes only the cleanest water from just below the surface.
The Float Switch
A float switch is installed in the tank to monitor the level of the rainwater. In periods of dry weather where the water level may fall below a set level the float switch triggers the control panel to supply mains water to the tank. In this way there is always water available in the system.