Let us agree to disagree.
Indirect System
An indirect cold water system is when water is supplied to the house at mains pressure, this water is fed directly to a cold water storage cistern via the supply pipe called the 'rising main'. A branch pipe off the rising main delivers drinking water to the kitchen and garden tap/faucet, cold water to all other taps/faucets and appliances is provided indirectly from the cold water storage cistern (not for drinking) under gravity pressure not mains pressure.
The hot water storage cylinder is also supplied with cold water from the same cistern.