Traditional in older homes form the 1930's and 1940's - these tanks are thinner and designed to go in a cupboard next to your wood stove
Fish Hook ....
Ever seen an older home with a copper pipe sticking out of the roof? This is called a Fish Hook and is designed to increase the hot water pressure in your home
How to buy the right size tank
FM tanks are perfect for any make or model wood stove or heater with a wet back. To size correctly, match the size of your FM tank to your hot water. The calculation is 1kW of hot water = 100ltrs of water. Example a 3kw Wet back would need a 300ltr FM tank