Catagories: Rain Water Harvesting


The Multi-siphon overflow unit has been designed specifically for use in rainwater storage tanks. 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. The unit also performs the important function within the tank of removing the floating debris from the surface of the water. This is achieved by the design of the units’ inlet, which is so shaped that when overflow conditions occur the water is ‘skimmed” rapidly into the horizontal opening.


  • Multifunctional overflow unit
  • Made of impact-resistant ABS plastic.
  • Connects to an overflow pipe.
  • Removes surface debris.
  • No drain smells.
  • Prevents rodents from entering into the tank
  • Corrosion proof
  • Optional anti-backflow device
  • Optional anti-vermin device
  • Horizontal opening maximizes skimming effects

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