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Water conservation

Water-efficient toilet annual payback calculator

Fill out all the boxes in the yellow column and then select the "Calculate" button at the bottom to see the costs and payback results for different toilets.

1) Water and sewer cost
     (per cubic metre per quarter)
2017 water rate $
2017 sewer rate $
Total water and sewer cost $
2) Water use per flush
  - pre-1980 toilets: 23L
  - 1980-1994 toilets: 13L
  - 1994-present toilets: 6L
  - Dual flush toilets: 4.8L (avg)
  - WaterSense labelled
     toilet: 4.8L
Current toilet  
New toilet  
Potential litres of water saved per flush
3) Number of times per day this toilet is flushed by everyone in household
(on average, a person flushes 5 times a day)
Litres saved per year
    Dollars saved per year $
4) Cost of new toilet: $ Years for payback
 

 
Last updated: January 3, 2017