In answer to Veggie's puzzle I'm going to go for tank 1. But that depends upon the tap flow being greater than the outflow.
If the above is false, ie the flow rate is not great enough to fill no. 1, the the answer is tank 6.
If the above is false, ie the flow rate is not great enough to fill no. 1, the the answer is tank 6.
Gardening is an excuse not to do housework
Greetings from Salisbury
Qualified member of the Confused Nutter's Club