My mum's house, 150 miles distant, is heated by oil. The vertical cylindrical plastic tank is 2550L bunded. Tank is remote from the house. Supply tank>boiler is 15mm copper. The tank does not have a gauge so I made a reasonably accurate (+/- 5%) dipstick. Mother is blind and does not/cannot supervise fuel delivery. The lorry driver 'just' tops it up when requested. I dipped the tank a couple of weeks back and reckoned it would take
16-1700L. Two days later it was filled up and the ticket shows 2300 odd litres. I have long suspected that the delivery driver is 'at it'. So I think a flow meter in the fuel supply would at least provide some more accuracy. I have no knowledge of such things and my apologies if this is a lazy request. Can you suggest a fairly accurate, mechanical, flow meter that can be fitted? Annual consumption is about 3500L, but that is debatable!Many thanks, Nick.