>> When the loss of water is great it does of course become obvious. It’s when
>> it’s comparatively slight and not noticeable that the problem arises as you can lose a
>> lot of water over a long period. When overflows were external you were alerted to
>> any loss by the dripping. A modest loss of water into the bowl is often
>> all but invisible.
Just got round to trying this, got a constant low leak in the upstairs toilet. Cheers I don't think I've heard about this before so would have never thought to have a look. Another job to add to the list!
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