The unit performs an important function within the tank. It removes the floating debris from the surface of the water every time the tank overflows.
The shape of the water inlet is designed so that when overflow occur the water is ‘skimmed’ rapidly into the horizontal opening. This can ensure better quality of stored rainwater.
The multisiphon overflow unit has been designed specifically for use in rainwater storage tank. The unit is effectively a “U” bend, providing a water seal. This acts as a barrier to unpleasant smells from the drain that connects to the overflow, which could otherwise taint the water.
If water from the sewer flows back into the unit, the polyethylene ball float is forced against an O-ring, effectively sealing the tank against the contamination.
The removable stainless steel grille prevents rats & other vermin from entering the tank.