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