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Somewhere around 30% of water usage occurs from flushing the toilet
so this is obviously an area to give careful consideration to. Modern
toilets use a dual flush mechanism using between 4 to 6 litres of
water. Unfortunately most of us are blessed with cistern capacities
of 10 litres or in the case of really old units 13 litres. The obvious
course of action is to replace the cistern mechanism but this costs
money. There are however several thing that can be done for free
to save water:
1. As the washer in the cistern wears the water level gradually
increases causing the capacity to increase above the figures quoted
above. Adjust the level to around 20mm below the normal setting,
this will save around 1 litre per flush possibly a lot more if the
level is very high and I doubt if anyone will notice any difference.
2. An alternative to the point above is to add something to the
cistern to displace water. These are known as lavatory hippos and
some water companies provide them for free. These typically reduce
the water used by between 1 and 2 litres.
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