How many litres does a canister (Water Pack and Fuel Pack) hold? 14 February 2024 07:52 Updated Both the water and fuel canisters have a capacity of 9 litres per canister. Related articles Backrack+ Canister HYMER Backrack+ Wheel Holder Are the lids of the canisters lockable? How much does the Fuel Pack weigh? How much does the Water Pack weigh?