Indoor Water Use Estimates for Toilets

Indoor Water Use Estimates

Indoor Water Use Estimates for Toilets

WELS

Rating

(Stars)

 

Household applicance

(Full flush (L)

low flush (L))

Number of people residing in household For each extra person
1 2 3 4 5
Toilet Flushing (L/year)
0 Single Flush (11/Flush) 20,100 40,200 60,200 80,300 100,400 20,100
0 Dual Flush 11/5 11,300 22,600 33,900 45,300 56,600 11,300
1 Dual Flush 9/4.5 9,900 19,700 29,600 39,400 49,300 9,900
3 Dual Flush 6/3 6,600 13,100 19,700 26,300 32,900 6,600
4 Dual Flush 4.5/3 6,000 12,000 18,100 24,100 30,100 6,000

 
NOTE: all figures are in litres per year (local housing type adn occupants’ age may vary the above consumption volumes). Toilet flushing figures are based on AS/NZS 1175 and AS/NZS 6400. Old plumbing systems designed for larger volume flushing toilets may not perform to expectation when new 4.5/3 L pans have been installed.

Single Flush Dual Flush 4.5/3