Storage water heater Galmet Vulcan SGW(S) standing 120 L with spiral coil (model 26-125500)

Storage water heater Galmet Vulcan SGW(S) standing 120 L with spiral coil is a vertical buffer tank for domestic hot water storage with an integrated spiral heat exchanger designed for indirect heating. The unit stores 120 litres of potable water and allows heat transfer from external sources such as a boiler or solar thermal circuit into the stored volume via the spiral coil. The compact, upright construction fits typical residential plant rooms and supports hydraulic connection to a heat source for efficient indirect water heating and thermal stratification management.

Advantages

The integrated spiral coil provides efficient heat exchange between the external heat source and stored water without mixing primary and secondary circuits. The vertical design minimises floor footprint while the 120 L capacity balances storage volume with compact dimensions for home installations. The construction supports indirect heating configurations, enabling connection to boilers, heat pumps or solar thermal collectors. Materials and internal layout are selected to ensure durability, regular thermal stratification and steady delivery of domestic hot water when combined with appropriate control and circulation equipment.

Suitable for

• Domestic hot water storage in single-family homes or apartments
• Integration with gas, oil or biomass boilers for indirect water heating
• Use as a hydraulic buffer with solar thermal systems or heat pumps
• Applications where a compact vertical buffer tank with internal coil is required

Key specifications

• Nominal storage volume: 120 litres
• Built-in spiral heat exchanger coil for indirect heating
• Vertical (standing) tank configuration to save floor space
• Hydraulic connections for external heat source and domestic hot water circulation
• Designed for domestic potable water storage and indirect heating systems

How to use

Install the Galmet Vulcan SGW(S) standing 120 L tank in a level, frost-protected space with access for hydraulic connections and maintenance. Connect the spiral coil to the external heat source circuit (boiler, solar loop or heat pump) following hydraulic diagrams and local plumbing codes; connect the domestic hot water inlet and outlet to the household distribution system with proper mixing or tempering valves as required. Commission the system by filling, venting air from both the tank and coil circuit, and checking for leaks. Adjust control settings on the external heat source or controller to manage charging cycles and maintain desired hot water temperature.

Usage recommendations

For reliable operation, use corrosion-resistant fittings, pressure relief and safety devices sized to local regulations, and install an appropriate thermostatic mixing valve to prevent scalding. Regularly inspect hydraulic connections and perform maintenance on the external heat source and any sacrificial anode or internal protective components per manufacturer guidance to maximise service life.