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Sewer dosing unit

From Wikipedia, the free encyclopedia

Drainwave sewer dosing unit
Drainwave sewer dosing unit

A sewer dosing unit (SDU) is a plumbing device to allow effective sewage disposal with low liquid-flow rates. With a global emphasis on water saving, many new buildings and renovations are seeing the installation of water saving fixtures such as low flow shower heads and low flush toilets. With the decrease in wastewater flows problems are arising from waste solids not being carried completely to the main sewers, often causing blockages.


  • 2006 – Ducane R&D Pty Ltd conceived the idea of a device that can store wastewater and release it in large batches to replace the drain clearing action of large volume toilet flushes.
  • 2010 – After much prototyping and development the devices are offered for sale in Australia, New Zealand and the United Kingdom under the name Drainwave.


Independent testing has shown that the use of an SDU allows for the use of low flush toilets using as little as 0.8 L to push general waste solids more than 25 metres along a typical wastewater drainpipe. An advantage of the SDU is that it can use more than just the toilet wastewater to keep drains clear of blockages.

See also

External links

This page was last edited on 23 May 2020, at 12:34
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