gas water-heater tank [2]

gas cock

Mechanism cutting off the gas supply when the water reaches the desired temperature.

pressure-relief valve

Device for lowering the pressure inside the tank by releasing excess hot water.

overflow pipe

Pipe through which water escapes when maximum pressure is exceeded.

reset button

Mechanism allowing the burner to be manually restarted.

control box

Box containing the set of controls that measure temperature and operate the burner.

drain valve

Device for emptying the water from the tank.

outer jacket

Metal casing protecting the tank.

hot-water outlet

Outlet pipe for hot water flowing into the hot-water circuit.

flue hat

Device reducing the amount of air withdrawn by convection.

temperature control

Device for setting the temperature.

flue

Channel through which combustion gases are evacuated.

thermostat

Mechanism controlled by fluctuations in temperature; it can be set to automatically switch the burner on or off.

cold-water supply line

Inlet pipe for cold water to the tank.

gas burner

Combustion device for an air-gas mixture.

glass-lined tank

Insulated reservoir protected against corrosion by an enamel or glaze coating.

insulation

Material placed between the tank and the outer walls of the hot-water tank in order to reduce heat loss.