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Cold water storage

Mains pressure hot water system with separate cold water storage supply

The rising main is connected directly to the calorifier, water heater or plate heat exchanger. Since the water in the system will expand due to heating, an expansion vessel and a safety temperature and pressure relief valve are required. Hot water distribution from pressurised systems can be used in both recirculation and non-recirculation systems. The latter is commonly found in houses with combination heating and hot water (combi) boilers. Cold water storage may supply water to some or all outlets.

Simplified mains pressure hot water system with separate cold water storage supply
Updated 2021-01-15