One of the biggest wasters of water in domestic props is all or most bogs now have flushing valves not syphons
flushing valves that do not seal correctly constantly let water drip / trickle into the pan . There were some figures published a while back over the caper.
flushing valves that do not seal correctly constantly let water drip / trickle into the pan . There were some figures published a while back over the caper.